| CONCOCTOR | • concoctor n. Alternative spelling of concocter. • CONCOCTOR n. one who concocts, also CONCOCTER. |
| DOCTORAND | • doctorand n. A postgraduate aiming to receive a doctorate; a Ph.D. student. • DOCTORAND n. a candidate for a doctorate. |
| DOCTORATE | • doctorate n. The highest degree awarded by a university faculty. • doctorate v. (Archaic) To make (someone) into a doctor. • DOCTORATE n. the academic degree of doctor. |
| DOCTORESS | • doctoress n. (Archaic) A female doctor. • DOCTORESS n. a female doctor, also DOCTRESS. |
| DOCTORIAL | • doctorial adj. (Dated) doctoral. • DOCTORIAL adj. of or pertaining to (the holder of) a doctorate, also DOCTORAL. |
| DOCTORING | • doctoring v. Present participle of doctor. • doctoring n. Treatment by a doctor; the practice of treating the sick; practising medicine. • DOCTORING n. the act of falsifying e.g. a document. |
| NONDOCTOR | • nondoctor n. One who is not a doctor. • NONDOCTOR n. someone who is not a doctor. |
| OCTOHEDRA | • octohedra n. Plural of octohedron. • OCTOHEDRON n. (Greek) a solid bounded by eight plane faces, also OCTAHEDRON. |
| OCTONARII | • octonarii n. Plural of octonarius. • OCTONARIUS n. in prosody, a line having eight feet, also OCTONARIAN. |
| OCTOPLOID | • octoploid adj. (Genetics) having eight complete sets of chromosomes in a single cell. • octoploid n. (Biology) a cell that has eight complete sets of chromosomes. • octoploid n. (Biology) an organism whose cells have eight complete sets of chromosomes. |
| OCTOPODAN | • octopodan adj. Relating to cephalopod molluscs of the order Octopoda. • OCTOPODAN n. an octopus or other eight-armed creature, also OCTOPOD. |
| OCTOPODES | • octopodes n. (Rare) plural of octopus. • octopodes n. (Rare) plural of octopode. • OCTOPUS n. (Greek) a nocturnal eight-armed mollusk. |
| OCTOPUSES | • octopuses n. Plural of octopus. • octopuses v. Third-person singular simple present indicative form of octopus. • OCTOPUS n. (Greek) a nocturnal eight-armed mollusk. |
| OCTOROONS | • octoroons n. Plural of octoroon. |
| OCTOSTYLE | • octostyle n. (Architecture) A temple or portico with eight columns in front. • OCTOSTYLE n. a building with eight columns, also OCTASTYLE. |
| OCTOTHORP | • octothorp n. Alternative spelling of octothorpe. • OCTOTHORP n. the symbol # on a telephone or keyboard (hash mark, pound sign, number sign). |
| PROCTODEA | • proctodea n. Plural of proctodeum. • PROCTODEUM n. the posterior portion of the alimentary canal, also PROCTODAEUM. |
| PROCTORED | • proctored v. Simple past tense and past participle of proctor. • PROCTOR v. to officiate as a proctor. |