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Common Prefixes
Medical Terminology
| Term | Definition |
|---|---|
| a-, an- | without |
| anti-, contra | against or opposed to |
| de- | from, down, or not |
| ab- | away from |
| ad- | to, toward, near |
| circum, peri | around |
| dia-, trans- | across or through |
| e-, ec, ex- | out or away |
| ecto-, exo-, extra- | outside |
| en-, endo- intra- | within |
| epi- | upon |
| inter- | between |
| meso- | middle |
| meta- | beyond, after, or change |
| para- | alongside of or abnormal |
| retro- | backward or behind |
| sub-, infra | below or under |
| bi- | two or both |
| hemi-, semi- | half |
| hyper- | above or excessive |
| hypo- | below or deficient |
| macro- | large or long |
| micro- | small |
| mono-, uni- | one |
| oligio- | few or deficent |
| pan- | all |
| poly-, multi- | many |
| quadri- | four |
| super-, supra- | above or excessive |
| tri- | three |
| ultra- | beyond or exessive |
| ante-, pre-, pro- | before |
| brady- | slow |
| tachy- | fast |
| post- | after or behind |
| re- | again or back |
| con-, syn, sym- | together or with |
| dys- | painful, difficult, or faulty |
| eu- | good or normal |
| neo- | new |