Orthopteran to Osmic
Orthopteran
(Or*thop"ter*an) n. (Zoöl.) One of the Orthoptera.
Orthopterous
(Or*thop"ter*ous) a. (Zoöl.) Of or pertaining to the Orthoptera.
Orthorhombic
(Or`tho*rhom"bic) a. [Ortho- + rhombic.] (Crystallog.) Noting the system of crystallization
which has three unequal axes at right angles to each other; trimetric. See Crystallization.
Orthoscope
(Or"tho*scope) n. [Ortho- + -scope.] (Physyol.) An instrument designed to show the condition
of the superficial portions of the eye.
Orthoscopic
(Or`tho*scop"ic) a. (Opt.) Giving an image in correct or normal proportions; giving a flat
field of view; as, an orthoscopic eyepiece.
Orthosilicic
(Or`tho*si*lic"ic) a. [Ortho- + silicic.] (Chem.) Designating the form of silicic acid having
the normal or highest number of hydroxyl groups.
Orthospermous
(Or`tho*sper"mous) a. [Ortho- + Gr. seed.] (Bot.) Having the seeds straight, as in the
fruits of some umbelliferous plants; — opposed to cœlospermous. Darwin.
Orthostade
(Or"tho*stade) n. [Gr. 'orqo`s straight + to place.] (Anc. Costume) A chiton, or loose,
ungirded tunic, falling in straight folds.
Orthostichy
(Or*thos"ti*chy) n.; pl. Orthostichies [Ortho- + Gr. row.] (Bot.) A longitudinal rank, or
row, of leaves along a stem.
Orthotomic
(Or`tho*tom"ic) a. [Ortho- + Gr. to cleave.] (Geom.) Cutting at right angles.
Orthotomic circle (Geom.), that circle which cuts three given circles at right angles.
Orthotomous
(Or*thot"o*mous) a. (Crystallog.) Having two cleavages at right angles with one another.
Orthotomy
(Or*thot"o*my) n. (Geom.) The property of cutting at right angles.
Orthotone
(Or"tho*tone) a. [Ortho- + Gr. tone, accent.] (Gr. Gram.) Retaining the accent; not enclitic; —
said of certain indefinite pronouns and adverbs when used interrogatively, which, when not so used, are
ordinarilly enclitic.
Orthotropal
(Or*thot"ro*pal Or*thot"ro*pous) a. [Ortho- + Gr. to turn: cf. F. orthotrope.] (Bot.) Having
the axis of an ovule or seed straight from the hilum and chalaza to the orifice or the micropyle; atropous.
This word has also been used (but improperly) to describe any embryo whose radicle points towards, or
is next to, the hilum.
Orthotropic
(Or`tho*trop"ic) a. [See Orthotropal.] (Bot.) Having the longer axis vertical; — said of
erect stems. Encyc. Brit.
Orthoxylene
(Or`tho*xy"lene) n. [Ortho- + xylene.] (Chem.) That variety of xylene in which the two
methyl groups are in the ortho position; a colorless, liquid, combustible hydrocarbon resembling benzene.
Ortive
(Or"tive) a. [L. ortivus, fr. oriri, ortus, to rise: cf. F. ortive.] Of or relating to the time or act of
rising; eastern; as, the ortive amplitude of a planet.
Ortolan
(Or"to*lan) n. [F., fr. It. ortolano ortolan, gardener, fr. L. hortulanus gardener, fr. hortulus,
dim. of hortus garden. So called because it frequents the hedges of gardens. See Yard an inclosure,
and cf. Hortulan.] (Zoöl.) (a) A European singing bird about the size of the lark, with black wings. It
