bi English
Etymology 1
From (m).
Adjective
( )
(colloquial) Bisexual.
 I'm hetero, but my oldest sister is bi .
See also
* bi
Etymology 2
(etyl)
Noun
(bi)
A type of jade disk produced in ancient China.

dual English
Alternative forms
*
Adjective
( )
Exhibiting duality; characterized by having two (usually equivalent) components.
Acting as a counterpart.
Double.
 dualheaded computer
(grammar) 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.
(linear algebra)
(category theory)
Derived terms
* duality
* dualism
Noun
( en noun)
Of an item that is one of a pair, the other item in the pair.
(geometry) Of a regular polyhedron with V'' vertices and ''F'' faces, the regular polyhedron having ''F'' vertices and ''V faces.
 The octahedron is the dual of the cube.
(grammar) 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 chiralitymarked 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.
(mathematics) 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.
See also
*
* unal
* duel
Anagrams
*
*
*

