| octavalent | <chemistry> Having a valence of eight; capable of being combined with, exchanged for, or compared with, eight atoms of hydrogen; said of certain atoms or radicals. Origin: Octa- + L. Valens, p. Pr. See Valence. Source: Websters Dictionary (01 Mar 1998) |
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| octavo | Having eight leaves to a sheet; as, an octavo form, book, leaf, size, etc. Source: Websters Dictionary (01 Mar 1998) |
| octavus | Synonym: vestibulocochlear nerve. Origin: L. (05 Mar 2000) |
| octene | <chemistry> Same as Octylene. See: Octo-. Source: Websters Dictionary (01 Mar 1998) |
| octi- | See: oct-. (05 Mar 2000) |
| octic | <mathematics> A quantic of the eighth degree. Origin: Octo- + -ic. Source: Websters Dictionary (01 Mar 1998) |
| octo- | See: oct-. (05 Mar 2000) |
| octoate | <chemistry> A salt of an octoic acid; a caprylate. Source: Websters Dictionary (01 Mar 1998) |
| october | 1. The tenth month of the year, containing thirty-one days. 2. Ale or cider made in that month. "The country gentlemen had a posset or drink they called October." (Emerson) Origin: L, the eighth month of the primitive Roman year, which began in March, fr. Octo eight: cf.F. Octobre. See Octave. Source: Websters Dictionary (01 Mar 1998) |
| octocerata | <zoology> A suborder of Cephalopoda including Octopus, Argonauta, and allied genera, having eight arms around the head. Synonym: Octopoda. Origin: NL, fr. Gr. Eight +, a horn. Source: Websters Dictionary (01 Mar 1998) |
| octodecimo | Having eighteen leaves to a sheet; as, an octodecimo form, book, leaf, size, etc. Origin: L. Octodecim eighteen. See Octavo, Decimal, and -mo. Source: Websters Dictionary (01 Mar 1998) |
| octodont | <zoology> Of or pertaining to the Octodontidae, a family of rodents which includes the coypu, and many other South American species. Origin: Octo- + Gr. Source: Websters Dictionary (01 Mar 1998) |
| octofid | <botany> Cleft or separated into eight segments, as a calyx. Origin: Octo- + root of L. Findere to split: cf.F. Octofide. Source: Websters Dictionary (01 Mar 1998) |
| octogynia | <botany> A Linnaean order of plants having eight pistils. Origin: NL, from Gr. Eight + a woman, female. (01 Mar 1998) |
| octogynous | <botany> Having eight pistils; octagynous. Source: Websters Dictionary (01 Mar 1998) |