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Medical Prefixes PT
| Prefix | Meaning | Example |
|---|---|---|
| ab- | away from | abduction |
| ad- | toward | adduction |
| ante- | before | antenatal |
| circum- | around | circumduction |
| con- (also co-, col-, com-, cor-) | with; together | convergent |
| dia- | through; complete | dialysis |
| ecto- | outside | ectogenous |
| endo-; en- | within | endoscope, encephalalgia |
| epi- | upon; on top; above | epicardium |
| eso- | within | estropia |
| ex-; exo- | outward; out | excise, exotropia |
| hyper- | above; excessive | hyperplasia |
| hypo- | below; deficient | hypogastric |
| in- (becomes ir- before r) | in; into | incision; irriatiation |
| infra- | below; beneath | infracostal |
| inter- | between | incercellular |
| intra- | within | intracellular |
| meta-; ultra- | beyond | metaplasia; ultrasound |
| per- | through | perfusion |
| peri- | around | perineuritis |
| post- | after | postpartum |
| pre- | before; infront of | prenatal |
| pro- | before | prognosis |
| sub- | under | sublingual |
| trans- | across | transection |
| anti- | against | antiarthritic |
| a-; an- | no; not | atoxic |
| contra- | against | contralateral |
| in- (becomes ir- before r; becomes im- before m, b, and p) | not | indigestible; irreducible; immature; imbalance; impotence |
| ana- | apart; backward; up | anaplasia |
| auto- | self | autolysis |
| bio- | life | biology |
| brady- | slow | bradypnea |
| dys- | bad; difficult; painful | dysplasia |
| macro- | large | macrocyte |
| mal- | bad | malaise |
| micro- | small | microencephaly |
| neo- | new | neonatal |
| pan- | all | pancarditis |
| syn- (becomes sym- before b, m, and p) | joined | synarthrotic |
| tachy- | rapid | tachycardia |
| bi-; di- | two | bilateral; diplegia |
| hemi-; semi- | half | hemihepatectomy; semicomatose |
| mono-; uni- | one | monocyte, unilateral |
| multi-; poly- | many | multiform, polyadenoma |
| quadri- | four | quadriplegia |
| tri- | three | triceps |
| cata- | down | catabolism |
| mort- | death | mortal |
| re- | back | resection |
| retro- | behind | retrogastric |