1 consisting of or involving two parts or components usually in pairs; "an egg with a double yolk"; "a double (binary) star"; "double doors"; "dual controls for pilot and copilot"; "duple (or double) time consists of two (or a multiple of two) beats to a measure" [syn: double, duple]
2 having more than one decidedly dissimilar aspects or qualities; "a double (or dual) role for an actor"; "the office of a clergyman is twofold; public preaching and private influence"- R.W.Emerson; "every episode has its double and treble meaning"-Frederick Harrison [syn: double, twofold, treble, threefold]
3 a grammatical number category referring to two items or units as opposed to one item (singular) or more than two items (plural); "ancient Greek had the dual form but it has merged with the plural form in modern Greek"
Adjectivedual (no or )
- Characterized by having two (usually equivalent) components.
- dual-headed computer
- Pertaining to grammatical number (as in singular and plural), referring to two of something, such as a pair of shoes, in the context of the singular, plural and in some languages, trial grammatical number. Modern Arabic displays a dual number, as did Homeric Greek.
having two components
Translations to be checked
Noundual (plural: duals)
- Of an item that is one of a pair, the other item in the pair.
- Of a regular
polyhedron with V
vertices and F faces, the regular polyhedron having F vertices and
- The tetrahedron is the dual of the cube.
- dual number The grammatical number of a noun marking two of something (as in singular, dual, plural), sometimes referring to two of anything (a couple of, exactly two of), or a chirality-marked pair (as in left and right, as with gloves or shoes) or in some languages as a discourse marker, "between you and me". A few languages display trial number.
- Of a vector in an inner product space, the linear functional corresponding to taking the inner product with that vector. The set of all duals is a vector space called the dual space.
EtymologyFrom dúal < < (cf. Icelandic tagl, Old English tægel, English tail).
Dual may refer to:
- a pair or a grouping of two:
- dual number, a grammatical construct in some languages
- dual troll, a secondary account on an internet message board
- dual fertilization, simultaneous application of a P-type and N-type fertilizer
- dual diagnosis, a psychiatric diagnosis of co-occurrence of substance abuse and a mental problem
- DUAL table, a special kind of one-row and one-column database table
- an acronym (DUAL):
- Diffusing update algorithm, used to update Internet protocol routing tables
dual in German: Dual
dual in French: Dual
dual in Polish: Dual
Janus-like, ambidextrous, bifacial, bifold, biform, bifurcated, bilateral, binary, binate, biparous, bipartisan, bipartite, bivalent, conduplicate, dichotomous, disomatous, double, double-barreled, double-faced, duadic, dualistic, duple, duplex, duplicate, duplicated, dyadic, geminate, geminated, identical, matched, paired, second, secondary, twain, twin, twinned, two, two-faced, two-level, two-ply, two-sided, two-story, twofold