Chapter United to Unknow of U by Webster's Dictionary (1913 Edition)

6. (Law) The peculiar characteristics of an estate held by several in joint tenancy.

The properties of it are derived from its unity, which is fourfold; unity of interest, unity of title, unity of time, and unity of possession; in other words, joint tenants have one and the same interest, accruing by one and the same conveyance, commencing at the same time, and held by one and the same undivided possession. Unity of possession is also a joint possession of two rights in the same thing by several titles, as when a man, having a lease of land, afterward buys the fee simple, or, having an easement in the land of another, buys the servient estate.

At unity, at one. — Unity of type. (Biol.) See under Type.

Syn. — Union; oneness; junction; concord; harmony. See Union.

Univalence
(U*niv"a*lence) n. (Chem.) The quality or state of being univalent.

Univalent
(U*niv"a*lent) a. [Uni- + L. valens, -entis, p. pr. See Valence.] (Chem.) Having a valence of one; capable of combining with, or of being substituted for, one atom of hydrogen; monovalent; — said of certain atoms and radicals.

Univalve
(U"ni*valve) n. [Uni- + valve: cf. F. univalve.] (Zoöl.) A shell consisting of one valve only; a mollusk whose shell is composed of a single piece, as the snails and conchs.

Most univalves are spiral and are the shells of gastropods, but many belong to cephalopods and pteropods. A large number of univalves belonging to the gastropods are conical, cup-shaped, or shieldlike, as the limpets.

Univalve
(U"ni*valve U"ni*valved) a. [Cf. F. univalve.] (Bot. & Zoöl.) Having one valve; as, a univalve shell or pericarp.

Univalvia
(||U`ni*val"vi*a) n. pl. [NL.] (Zoöl.) Same as Gastropoda.

Univalvular
(U`ni*val"vu*lar) a. (Bot. & Zoöl.) Same as Univalve, a.

Universal
(U`ni*ver"sal) a. [L. universalis: cf. F. universel, OF. also universal. See Universe.]

1. Of or pertaining to the universe; extending to, including, or affecting, the whole number, quantity, or space; unlimited; general; all-reaching; all-pervading; as, universal ruin; universal good; universal benevolence or benefice. "Anointed universal King." Milton.

The universal cause
Acts not by partial, but by general laws.

Pope.

This universal frame began.

Dryden.

Universal and its derivatives are used in common discourse for general and its derivatives. See General.

2. Constituting or considered as a whole; total; entire; whole; as, the universal world. Shak.

At which the universal host up dent
A shout that tore Hell's concave.

Milton.

3. (Mech.) Adapted or adaptable to all or to various uses, shapes, sizes, etc.; as, a universal milling machine.

4. (Logic) Forming the whole of a genus; relatively unlimited in extension; affirmed or denied of the whole of a subject; as, a universal proposition; — opposed to particular; e. g. (universal affirmative) All men are animals; (universal negative) No men are omniscient.