Dual

Adjective

 * 1) Characterized by having two (usually equivalent) components.
 * 2) Double.
 * 3)  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.

Noun

 * 1) Of an item that is one of a pair, the other item in the pair.
 * 2)  Of a regular polyhedron with V vertices and F faces, the regular polyhedron having F vertices and V faces.
 * 3)  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.
 * 4)  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.

Adverbs for Dual
awkwardly; gawkily; pathetically; ludicrously; ridiculously; distressingly; crookedly.

Thesaurus
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

Etymology
dualis:, from duo:, + adjective suffix -alis:

Derived terms

 * duality
 * dualism

Anagrams

 * auld
 * laud
 * udal

Adjective

 * Bulgarian: от две части
 * Dutch: tweeledig
 * Esperanto: duparta, duala, duobla, binara
 * Finnish: kaksikko-, kaksois-
 * French: ,


 * Indonesian: dwi
 * Manx: dooblit
 * Polish:
 * Russian: ,
 * Spanish:


 * Bulgarian: двоен
 * Dutch: dubbel-
 * Esperanto:
 * Finnish: kaksikko-, kaksinkertainen
 * French:
 * Indonesian:


 * Manx: dooblit
 * Polish:
 * Russian:, ,
 * Spanish:
 * Turkish: çift


 * Czech: duálový
 * Finnish: kaksikko-, duaalinen, duaali-
 * French:


 * Indonesian:
 * Russian: двойственный (dvójstvennyj)
 * Spanish:

Noun

 * Arabic: (muṯánna)
 * Czech: ,
 * French:
 * German: Dual


 * Polish: liczba podwójna
 * Russian: двойственное число (dvójstvennoje čisló)

Etymology
From dúal: <  <  (compare Icelandic tagl:, Old English tægel:, English tail:).

Noun

 * 1) tuft

Noun

 * 1) birthright

Adjective

 * 1) dual
 * 2)  dual