| OCTAGONS | • octagons n. Plural of octagon. • OCTAGON n. an eight-sided plane figure. |
| OCTANGLE | • octangle n. A geometric figure with eight corners, an octagon. • OCTANGLE n. an octagon. |
| OCTANOLS | • octanols n. Plural of octanol. • OCTANOL n. an alcohol. |
| OCTANTAL | • octantal adj. Relating to an octant. • OCTANTAL adj. relating to an octant. |
| OCTAPLAS | • OCTAPLA n. (Greek) a book of eight (especially Biblical) parallel texts. |
| OCTAPODY | • octapody n. (Prosody) A metre or verse of eight feet. • OCTAPODY n. in verse, a line of eight feet. |
| OCTARCHY | • octarchy n. A group of eight states. • octarchy n. A government of eight people. • OCTARCHY n. a government by eight people. |
| OCTETTES | • octettes n. Plural of octette. • OCTETTE n. a composition for eight players, also OCTET, OCTETT. |
| OCTONARY | • octonary adj. Of eighth rank or order. • octonary adj. Consisting of eight things. • octonary n. A group of eight things. |
| OCTOPODS | • octopods n. Plural of octopod. • OCTOPOD n. any of an order of eight-armed mollusks. |
| OCTOPOID | • octopoid adj. Of, pertaining to, or resembling an octopus or octopod; octopuslike. • octopoid adj. Widespread; reaching across or penetrating large distances; controlling many things from a central point. • octopoid n. An octopuslike creature. |
| OCTOPUSH | • octopush n. (UK) The sport of underwater hockey. • OCTOPUSH n. a type of underwater hockey. |
| OCTOROON | • octoroon n. (Dated or historical, now offensive) Someone having one-eighth black ancestry. • octoroon n. (Dated or historical, now offensive) Someone having 1/64th black ancestry: the child of a quintoon and a white man. |
| OCTUPLED | • octupled v. Simple past tense and past participle of octuple. • OCTUPLE v. to multiply by eight. |
| OCTUPLES | • octuples n. Plural of octuple. • OCTUPLE v. to multiply by eight. |
| OCTUPLET | • octuplet n. A group of eight things, particularly. • OCTUPLET n. one of eight children born at one birth. |
| OCTUPLEX | • octuplex adj. Having eight components. • OCTUPLEX adj. being eight times as great. |