| OCTADIC | • octadic adj. Of or pertaining to an octad; eightfold. • OCTADIC adj. relating to an octad. |
| OCTAGON | • octagon n. (Geometry, also attributively) A polygon with eight sides and eight angles. • octagon n. (Martial arts) Often in the form Octagon: the arena for mixed martial arts. • OCTAGON n. an eight-sided plane figure. |
| OCTANES | • octanes n. Plural of octane. • OCTANE n. any of a series of saturated hydrocarbons. |
| OCTANOL | • octanol n. (Organic chemistry) Any of many isomers of the saturated aliphatic alcohol having eight carbon atoms… • OCTANOL n. an alcohol. |
| OCTANTS | • octants n. Plural of octant. • OCTANT n. an eighth part of a circle. |
| OCTAPLA | • octapla prop.n. A text presented in eight parallel versions, especially (historical) the version of the Bible presented… • Octapla prop.n. A Biblical octapla: an edition of the Bible in eight parallel versions or languages. • OCTAPLA n. (Greek) a book of eight (especially Biblical) parallel texts. |
| OCTAVAL | • octaval adj. (Music) Of, pertaining to, or relating to an octave. • octaval adj. Proceeding by intervals of eight. • octaval adj. Octonary; expressed in base-8; octal, octonal. |
| OCTAVES | • octaves n. Plural of octave. • OCTAVE n. a set of eight musical notes. |
| OCTAVOS | • octavos n. Plural of octavo. • OCTAVO n. (Latin) a page size, also EIGHTVO. |
| OCTETTE | • octette n. Alternative spelling of octet. • OCTETTE n. a composition for eight players, also OCTET, OCTETT. |
| OCTETTS | • octetts n. Plural of octett. • OCTETT n. a composition for eight players, also OCTET, OCTETTE. |
| OCTOFID | • octofid adj. (Botany) Cleft or separated into eight segments. • OCTOFID adj. cleft or separated into eight segments, as a calyx. |
| OCTOPOD | • octopod n. Any animal with eight feet or foot-like parts. • octopod n. Any cephalopod mollusks of the order Octopoda. • octopod n. A railway locomotive with eight wheels. |
| OCTOPUS | • octopus n. Any of several marine molluscs of the family Octopodidae, having no internal or external protective… • octopus n. (Uncountable) The flesh of these marine molluscs eaten as food. • octopus n. An organization that has many powerful branches controlled from the centre. |
| OCTROIS | • octrois n. Plural of octroi. • OCTROI n. (French) a duty levied on certain goods entering a town, esp. in some European countries. |
| OCTUORS | • octuors n. Plural of octuor. • OCTUOR n. (French) an octet. |
| OCTUPLE | • octuple adj. Eightfold. • octuple n. An eightfold amount or number. • octuple v. (Intransitive) To increase eightfold. |
| OCTUPLY | • octuply adv. In an eightfold manner. • OCTUPLE adv. eightfold. |