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Prefixes
Medical Terminology
| Term | Definition |
|---|---|
| a-, an-, ar- | without |
| ab- | away from |
| ad- | toward |
| alb- | white |
| ambi- | both |
| ankyl(o)-, ancyl(o)- | crooked |
| ante- | before |
| anti- | against |
| aut(o)- | self |
| bi-, bin- | both, two |
| brachy- | short |
| brady- | slow |
| cata- | down, reverse |
| chlor(o)- | green |
| chromat(o)- | color |
| chrom(o)- | color |
| circum- | around |
| cirrh(o)- | yellow |
| co-, con-, com- | together |
| contra- | against |
| cry(o)-, crym(o)- | cold |
| crypt(o)- | concealed |
| cyan(o)- | blue |
| de- | down, from |
| demi- | half |
| dextr(o)- | right |
| di- | double |
| dipl(o)- | double |
| dis-, di-, dif- | take apart |
| dors(o)- | back |
| dys- | painful, abnormal |
| ec- | out of |
| ect(o)- | outside |
| en-, endo-, ento- | inside |
| epi- | above |
| erythr(o)- | red |
| exo- | outside |
| extra- | outside, in addition |
| fore- | before, front |
| gen- | produce |
| glauc(o)- | grey |
| hemi- | half |
| heter(o)- | different |
| homeo-, homo- | same |
| hydr(o)- | water |
| hyper- | excessive |
| hypo- | deficient |
| idio- | self, separate |
| im- | not |
| in- | into, not |
| infra- | beneath |
| inter- | between |
| intra- | inside |
| iso- | same |
| later(o)- | to the side |
| lept(o)- | slender |
| leuc(o)-, leuk(o)- | white |
| macr(o)- | large |
| mal- | bad, abnormal |
| mega-, megalo- | large |
| melan(o)- | black |
| mes(o)- | middle |
| meta- | change, exchange |
| micro- | small |
| mon(o)- | one |
| neo- | new |
| nulli- | none |
| olig(o)- | small, insufficient |
| orth(o)- | straight |
| ox(o)- | oxygen |
| pachy- | thick |
| pan- | all |
| para-, par- | near, apart from |
| peri- | around |
| pleo-, pleio- | more |
| polio- | grey matter |
| poly- | many |
| post- | behind, after |
| pre- | before |
| prim- | first |
| pro- | in front of |
| proto- | first |
| pseud(o)- | false |
| quadr(i)- | four |
| retro- | backward |
| semi- | half |
| sinistr(o)- | left side |
| sub-, sup- | below, under |
| super- | excessive |
| supra- | above |
| sym-, syn- | together |
| tachy(o)- | rapid |
| tetra- | four |
| trans- | across |
| tri- | three |
| ultra- | excess, beyond |