If you come across a word like cryoglobulinemia and think, It’s Greek to me, there’s good reason for that. It is Greek. And Latin. Most medical terms — over 90% — originate in Greek and Latin. But don’t let that intimidate you when it comes to medical terminology.
More than 60% of our everyday words are borrowed from Greek and Latin, which means you have a familiarity with medical terminology that you might not realize. It’s not a big jump, for example, to go from acrobat to acromania or acroanesthesia.
Among our tips and strategies for learning medical terminology, we’re going to show you how to put your familiarity to work for you. But first, let’s answer a few questions so we can establish who should study medical terminology and why.
When it comes to medical terminology, think LEGO. A LEGO brick is just a LEGO brick, but when you snap these pieces of plastic together, you get something upscale.
Similarly, word parts — like mini bricks — make up most medical terms. Once you start to learn the word parts, you no longer see an unknowable 21-letter word. When, for example, you look at osteochondrodysplasia, you see:
So osteochondrodysplasia becomes recognizable. You might not know the full extent of the definition, but you piece together that the term refers to a developmental abnormality that affects bone and cartilage.
And just as a LEGO brick can be used in different constructions, you’ll see a same word part in numerous medical terms. In fact, now that you learned four word parts, you have insight on an exponential list of medical terms.
We’ll look at more examples of word parts and show you how familiarity goes a long way in building your medical terminology vocabulary, but first let’s look at the different types of word parts.
The construction of most medical terms follows the common structure of a prefix, medical root, and suffix.
Mentally dividing a medical term into its word parts will help you to figure out the meaning of the unfamiliar term. But before you can deconstruct medical terms, you need to know a few things about how they’re constructed.
A medical term can consist of almost any combination of word parts:
Medical terms get awkward to pronounce without a device for linking word parts, and so the combining vowel system was developed.
When two medical root words are connected, a combining vowel is added to the end of the first root word. A combining vowel is used with the second root word if the subsequent word part begins with a consonant. The letter o is the most commonly used combining vowel.
By way of example, gastr is the root word for stomach. When linked with the suffix -logy, meaning study or medical field, an o is added, forming the word gastrology.
But if the word part following gastr begins with a vowel, then the combining vowel is unnecessary, as seen in the example term gastritis, which means inflammation of the stomach lining.
In the medical term deconstructed below, we see an example of two combining vowel practices — an o linking root words, and the omission of the combining o when the suffix begins with a vowel.
But what about when a root word ends in a vowel? The combining o is again omitted, as seen in the medical terminology example enterocentesis, which refers to a surgical puncture of the intestines. Enterocentesis also illustrates that not all root words refer to human anatomy.
Lastly, if you’re wondering why we didn’t break down a medical term with a prefix to illustrate how the prefix links to a root word, it’s because the combining vowel only applies to root words and suffixes.
Whether a prefix ends in a vowel or a consonant is of no consequence to the formation of the medical term, as you can see in these two examples.
While you’re probably familiar with the words hypoglycemia (low blood sugar) and hyperthermia (elevated body temperature), you can now see where their definitions originate.
Understanding the structure of medical terms allows you to see the word parts and leverage an ever-increasing familiarity with them. This is an expedient way to get a handle on medical language.
Consider the word hemorrhage, for instance. You know the meaning of the term, but you probably never noticed the word parts. Can you see the structure now? If not, look for an o. Not all medical terms have a combining o, but when they do, it’s an obvious demarcation of structure.
The o in hemorrhage divides the term in two: hem + o + rrhage. You may recognize hem or guess that it means blood, and you’d be correct. -rrhage is likely new to you. It means burst, as in a dam breaking, and conveys excessive bleeding or fluid loss resulting from a damaged blood vessel.
Making a note of the structure in this one term gives you a head start on words like rhinorrhage, splenorrhage, otorrhage, hepatorrage. And once you learn the root words in these four terms — nose, spleen, ear, and liver respectively — you’re able to expand your medical vocabulary in four directions.
Here are a few tips that will take you far:
When learning new information, context is like a corkboard in your brain, giving the information a place to stick. For this reason, you’ll find lessons structured categorically when you take anatomy and medical terminology courses. Understanding and retaining information is easier with a categorical approach.
While reviewing a sampling of root words below, remember: As with a prefix and suffix, a root word is a part of the medical term and is not a word in itself. A suffix, with few exceptions, will be added to the root word to complete it.
bile or gallbladder
intestine (usually small)
ren, renal, neph, nephro
capill, capilli
hem, hemat, sangu
bronch, laryng
pneum, pneumat,
pneumon, pulmon
arthr, articul
cut, derm, dermato
osse, osso, oste
Earlier we told you that a medical term could consist of almost any combination of word parts — including root words only. This is a rare occurrence and, as we’ll show you, only technically true.
Sternocleidomastoid. In this example, three root words are combined to form sternocleidomastoid, which refers to a muscle on each side of your neck that starts at the top of the sternum and the clavicle, then reaches up to insert behind your ear on the mastoid process of the temporal bone. It’s an unusual medical term, in that it doesn’t have a suffix. As you’ll soon see, though, -oid is a suffix meaning to resemble or similar to. Because it’s built into the root word mastoid, these three root words together are complete.
Of course, root words can represent more than body parts and body systems.
examine by striking
Before peeking below, test your thought process. You’re familiar with the word dehydrate and with the word hydrate, so what do you think the de- prefix means?
Remember to analyze new terms. Break down the word parts, think it through, and keep adding to your stack of medical terminology flashcards.
anter-, anteri-
away from, detached
circum-, peri-
apart, away from
ec-, ecto-, ex-, extra-
back or posterior to
As you see in the above table, post means behind. This prefix, though, must be read contextually to parse the correct meaning of the medical term in question. For example, postcordial means behind the heart, whereas postvaccinal means after vaccination. In one instance post- indicates a location and in the other instance, post- indicates time.
While dual meanings attributed to word parts aren’t overly common, they’re not uncommon either. Consider anteversion, the tipping forward of an organ, versus antepartum, before childbirth.
In another sense, you can think of post- and ante- as each have one definition:
The point to remember is, when deconstructing medical terms, use common sense, equal parts logic and familiarity.
pro-, pre-, ante-
absence of, without
down from, lack of, remove
half (one of two sides)
quad-, quadri-
EXAMPLES: Analgesia is the absence of felt pain. Hemianalgesia is the absence of felt pain on one side of the body. Conversely, panphobia is a fear of everything. The term pancytopenia refers to the abnormal depression of all the cellular elements of the blood.
hyper-, super-
anti-, contra-
Can you differentiate neonatal from prenatal? The root word, natal, means pertaining to birth. So, neonatal is new birth, (specifically, the first four weeks after birth), and prenatal means before birth.
grain or particle
macro-, mega-, megal-
excision, removal of
surgically created opening
blood (condition of)
dissolve or destruction
growth, mass, tumor
-osis, -esis, -iasis
abnormal condition or disease
-rrhag, -rrhage, -rrhagia
burst, excessive flow
process, action, or condition
Ilium and ileum. A one-letter substitution and you have a different word, which is why you'll need to examine provider documentation as it pertains to your professional responsibilities.
Spelling matters when it comes to reading a patient's diagnosis, test results, medicine prescriptions, and treatments. Incorrectly interpreting patient information can adversely affect patient care.
Tip: In addition to taking caution with look-alike words and medical abbreviations, familiarize yourself with the plural form of common suffixes you'll encounter.
The plural form of most medical terms departs from the standard s or es. In some cases, you'll find leniency. You could, for instance, say sacromas instead of sarcomata, but you need to know plural form well enough to recognize what you're reading.
How a medical term is made plural depends on the last two letters of its singular suffix.
plexus, plexuses and embolus, emboli
If your sights are set on the healthcare profession, specifically medical coding, consider prioritizing an online medical terminology course. Though learning medical terminology may be easier than you thought, there’s still a lot to learn.
In addition to anatomical terms, conditions, diseases, injuries, surgical procedures, and medical treatments — all of which number in the thousands — you also need to navigate a myriad of drugs, equipment, and supplies. And not all body parts and medical words are composed of identifiable components.
Consider the integumentary system. The skin is the body's largest organ and is studied as an anatomical system, just like the musculoskeletal system, urinary system, nervous system, endocrine system, etc. But the “skin” system gets its name from integument, a Latin word that means to cover. Integument is just one example of a medical word that is not intuitive, as it cannot be broken down into recognizable parts.
You’ll also encounter medical terminology referred to by multiple terms, as well as eponyms (words derived from someone’s name) and acronyms, ands words derived from Latin and French.
For this reason, AAPC requires students training for a career in medical coding to take a medical terminology class. The importance of a reliable and expansive medical vocabulary, in addition to knowledge of human anatomy, can’t be understated.
Albert Einstein is credited with saying, "Never memorize what you can look up in books." Smart man. You will undoubtably commit much of your career training to memory, but the human brain has limits.
So start building a library, and choose a good medical dictionary for your first purchase. You'll need a comprehensive resource — Dorland's Illustrated Medical Dictionary or Stedman's Medical Dictionary for the Health Professions and Nursing. If you’re tempted to cut costs and go with free web content, you won't have access to the information you need. Consider buying used instead.
The Coders' Dictionary & Reference Guide is designed for coding and billing students. You can reference anatomical illustrations and industry acronyms, as well as an extensive glossary of coding, billing, and medical terms. It's worth taking a look inside to see if this book meets your needs.
But don't forget, you'll also find helpful info in your CPT ® code books. This includes illustrations, diagrams, and medical abbreviations. For those with Codify subscriptions, you can add Dorland's Illustrated Medical Dictionary, which gives you full content and makes deciphering chart note terms easy.
Why are you studying medical terminology? For many of you, the answer to that question is a rewarding career in medical coding and billing. Our final tip to acing medical terminology, then, is to keep that career goal front and center. Motivation will fuel your studies, helping you to go the distance and to enjoy the journey.
Dorland's Illustrated Medical Dictionary. 28th ed. Philadelphia: W.B. Saunders Co., 1994.