OCTODECIMO
Oc`to*dec"i*mo, n.; pl. Octodecimos (.
Defn: 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 18º, and called eighteenmo.
OCTODENTATE
Oc`to*den"tate, a. Etym: [Octo- + dentate.]
Defn: Having eight teeth.
OCTODONT
Oc"to*dont, a. Etym: [Octo- + Gr. (Zoöl.)
Defn: Of or pertaining to the Octodontidæ, a family of rodents which includes the coypu, and many other South American species.
OCTOEDRICAL
Oc`to*ed"ric*al, a.
Defn: See Octahedral. [Obs.] Sir T. Browne.
OCTOFID Oc"to*fid, a. Etym: [Octo- + root of L. findere to split: cf.F. octofide.] (Bot.)
Defn: Cleft or separated into eight segments, as a calyx.