n. (Chem.) A salt of an octoic acid; a caprylate. [ 1913 Webster ]

n. [ L., the eighth month of the primitive Roman year, which began in March, fr. octo eight: cf. F. Octobre. See Octave. ] 1. The tenth month of the year, containing thirty-one days. [ 1913 Webster ]

2. Ale or cider made in that month. [ 1913 Webster ]

The country gentlemen had a posset or drink they called October. Emerson. [ 1913 Webster ]

‖n. pl. [ NL. ] Octocerata. [ 1913 Webster ]

‖n. pl. [ NL., fr. Gr. 'oktw` eight + &unr_;, a horn. ] (Zool.) A suborder of Cephalopoda including Octopus, Argonauta, and allied genera, having eight arms around the head; -- called also Octopoda. [ 1913 Webster ]

n. (Mus.) See Octachord. [ 1913 Webster ]

a. [ L. octodecim eighteen. See Octavo, Decimal, and -mo. ] Having eighteen leaves to a sheet; as, an octodecimo form, book, leaf, size, etc. [ 1913 Webster ]

n.; pl. Octodecimos A book composed of sheets each of which is folded into eighteen leaves; hence; indicating more or less definitely a size of book, whose sheets are so folded; -- usually written 18mo or 18°, and called eighteenmo. [ 1913 Webster ]

a. [ Octo- + dentate. ] Having eight teeth. [ 1913 Webster ]

a. [ Octo- + Gr. &unr_;, &unr_;. ] (Zool.) Of or pertaining to the Octodontidae, a family of rodents which includes the coypu, and many other South American species. [ 1913 Webster ]

a. See Octahedral. [ Obs. ] Sir T. Browne. [ 1913 Webster ]