1. (Crystallog.) Having but one optic axis, or line of no double refraction.
In uniaxial crystals, the optic axis has the direction of the vertical crystallographic axis. All tetragonal
and hexagonal crystals are uniaxial.
2. (Biol.) Having only one axis; developing along a single line or plane; — opposed to multiaxial.
Uniaxially
(U`ni*ax"i*al*ly), adv. In a uniaxial manner.
Unibranchiate
(U`ni*bran"chi*ate) a. [Uni- + branchiate.] (Zoöl.) Having but one gill, as certain molluscs.
Unicameral
(U`ni*cam"e*ral) a. [Uni- + L. camera vault.] Having, or consisting of, a single chamber; —
said of a legislative assembly. [R.] F. Lieber.
Unicapsular
(U`ni*cap"su*lar) [Uni- + capsular: cf. F. unicapsulaire.] (Bot.) Having but one capsule to
each flower.
Unicarinated
(U`ni*car"i*na`ted) a. [Uni- + carinated.] Having one ridge or keel. Craig.
Unicelled
(U"ni*celled`) a. [Uni- + cell.] (Biol.) Unicellular.
Unicellular
(U`ni*cel"lu*lar) a. [Uni- + cellular.] Having, or consisting of, but a single cell; as, a unicellular
organism.
Unicentral
(U`ni*cen"tral) a. [Uni- + central.] (Biol.) Having a single center of growth.
Unicentral development, that form of development which takes place primarily around a single central
point, as in the lowest of unicellular organisms.
Unicity
(U*nic"i*ty) n. [L. unicus single. See Unique.] The condition of being united; quality of the
unique; unification.
Not unity, but what the schoolmen call unicity.
De Quincey.
The unicity we strive not to express, for that is impossible, but to designate by the nearest analogy.
Coleridge. Uniclinal
(U`ni*cli"nal) a. [Uni- + Gr. to incline.] (Geol.) See Nonoclinal.
Unicolorous
(U`ni*col"or*ous) a. [Uni- + color.] (Zoöl.) Having the surface of a uniform color.
Unicorn
(U"ni*corn) n. [OE. unicorne, F. unicorne, L. unicornis one-horned, having a single horn;
unus one + cornu a horn; cf. L. unicornuus a unicorn. See One, and Horn.]
1. A fabulous animal with one horn; the monoceros; — often represented in heraldry as a supporter.
2. A two-horned animal of some unknown kind, so called in the Authorized Version of the Scriptures.
Canst thou bind the unicorn with his band in the furrow?
Job xxxix. 10. The unicorn mentioned in the Scripture was probably the urus. See the Note under Reem.
3. (Zoöl.) (a) Any large beetle having a hornlike prominence on the head or prothorax. (b) The larva
of a unicorn moth.
4. (Zoöl.) The kamichi; — called also unicorn bird.
