Principles and Components of Medical Terminology
Medical terminology is a special vocabulary used by health professionals for effective and accurate communication. It provides definitions and explanations of word parts, including prefixes, suffixes, and combining forms, which are essential for constructing and understanding medical terms. As a living language, it utilizes specific rules for pronunciation and pluralization to ensure clarity in clinical settings.
Understanding Medical Terms
It is impossible to memorize all of the thousands of medical terms; however, you can distinguish the meaning of many different words by analyzing the word parts. The document outlines the principles of medical terminology, emphasizing its significance for effective communication among health professionals. Most medical terms are built from four basic word parts:
- Word root: The foundation of the word and the general meaning of the word. It often gives the body system or part (e.g., cardi = heart) or may represent an action (e.g., cis = to cut).
- Prefix: Located at the beginning of the word to modify its meaning.
- Suffix: Located at the end of the word.
- Combining vowel: A vowel (usually "O") that links the word root to another root or suffix, making it possible to pronounce long terms.
Examples of Word Part Construction
Medical terms are built from these word parts to create specific meanings. For example, using the root "cardi" (heart):
- Cardiogram: record of the heart
- Pericardium: around the heart
- Carditis: inflammation of the heart
- Cardiomyopathy: heart muscle disease
Medical terms may have more than one word root, such as in osteoarthritis. Alternatively, terms may be built without a word root; for instance, hypertrophy is formed by the prefix hyper- (excessive) and the suffix -trophy (development).
Common Medical Prefixes, Suffixes, and Combining Forms
Combining vowels are utilized in two places: between two word roots or between a word root and a suffix. The following table provides examples of common word parts found in medical literature:
| Word Part | Type | Meaning |
|---|---|---|
| a-, an- | Prefix | not, without, less |
| adeno- | Combining form | gland |
| adip- | Word root | fat |
| angi- | Word root | vessel |
| arthr- | Word root | joint, articulation |
| -centesis | Suffix | surgical puncture |
| -cyte | Suffix | cell |
| -dynia | Suffix | pain |
| -ectomy | Suffix | excision |
Rules for Combining Vowels
The combining form is a word root plus a combining vowel. For example, cardio- is the combining form for the heart. These forms make it possible to pronounce long terms and are essential for the structural integrity of the medical language used in clinical settings.