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Root Word Dictionary – O
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Root Word Dictionary is the most comprehensive online dictionary providing meanings for the Greek and Latin root words used in constructing biological and medical terminology. It defines more biomedical roots than any other online source. For more details about how to use this dictionary, click here.
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Greek Roots: |
Latin Roots: | ||
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odous, odont — Something pointed; tooth, spike. odyne — Pain. oidema — Swelling. oikos — Habitation. oion — Egg. oisophagos — Esophagus. olecranon — Elbow. oligos — Few, little, scanty, small. omia — Shoulder. omos — Ulna. ombros — Rain. omphalos — Navel, umbilical cord. on — Being (pres. participle of einein). onkinos — Hook. onkos — Bulk, mass. onoma — Name. onyx — Talon, claw. ophthalmos — Eye. ops — Eye, face. optikos — Of or for sight. orchis — Testicle. oros — Mountain. orthos — Straight, correct, true, just. osche — Scrotum. osme — Smell, odor, sense of smell. osmos — Thrusting. osphresis — Smell. osteon — Bone. ostrakon — Shell. oulon — The gums. oura — Tail. oureter — Ureter. ouron — Urine. ous — Ear. |
ob — Toward, against, in the way of. occludere — Close, shut, close off. octo, octavus, -a, -um — Eight. oculus, oculi — Eye. olea, oleae — Oil, olive, olive tree. olfacere — To smell. omnis — All, every. optime — (adv.) Best, well. optimus, optima, optimum — (adj.) Best. opus, operis — Work done, labor. orexis, orexis — Appetite. origo, originis — Origin, source, birth, ancestry. ornatus, ornata, ornatum — Decorated. oryza, oryzae — Rice. os, oris — (1) mouth; (2) face. os, ossis — Bone. ostium, osti(i) — Front door, entrance, mouth (of river). ostrea, ostreae — Oyster. ovis, ovis — Sheep. ovarium, ovarii — Ovary. ovum, ovi — Egg. |
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