Roots, Prefixes & Suffixes
O
| o/o | egg (ovum) |
| obstetr/o | midwife |
| occlus/o | close, obstruct |
| ocul/o | eye |
| odont/o | tooth |
| -oid | pertaining to, resemble [suffix] |
| -ole | small opening [suffix] |
| olecran/o | olecranon (elbow) |
| olfact/o | smell |
| oligo- | few, scant [prefix] |
| -ologist | one who studies [suffix] |
| -ology | study of [suffix] |
| -oma | tumor, mass [suffix] |
| omphal/o | navel |
| -on | that goes [suffix] |
| onc/o | tumor, mass |
| onych/o | nail |
| oophor/o | ovary |
| ophry/o | eyebrow |
| ophthalm/o | eye |
| -opia | vision [suffix] |
| -opsia | vision [suffix] |
| -opsy | viewing [suffix] |
| opt/o | eye, vision |
| optic/o | sight, vision |
| -or | doer, one who [suffix] |
| or/o | mouth |
| orch/o | testicle |
| orchi/o | testis |
| orchid/o | testicle |
| -orexia | appetite [suffix] |
| organ/o | organ |
| orth/o | straight; correct |
| -ory | relating to [suffix] |
| oscill/o | swing |
| -ose | sugar [suffix] |
| -osis | (abnormal) condition [suffix] |
| oss(eo/i) | bone |
| oste/o | bone |
| -ostomy | artificial opening [suffix] |
| ot/o | ear |
| -otomy | cut in [suffix] |
| -ous | pertaining to [suffix] |
| ov(i/o) | egg (ovum) |
| ovari/o | ovary |
| ox(i/o/y) | oxygen |
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Gr. Greek origin. L. Latin origin.
This content should not be used in place of medically-reviewed decision support reference material or professional medical advice. The definitions on this page should not be considered complete.