opponency


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op·po·nent

 (ə-pō′nənt)
n.
1. One that opposes another or others, as in a battle, contest, or debate: a political opponent.
2. One who is hostile to an idea or cause: an opponent of gun control.
adj.
Acting against an antagonist or opposing force: opponent armies.

[Latin oppōnēns, oppōnent-, present participle of oppōnere, to oppose; see oppose.]

op·po′nen·cy n.

opponency

1. the state or quality of being an opponent.
2. an act or instance of opposing.
See also: Conflict
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References in periodicals archive ?
By simulating the colour-double-opponent system in parts of human brain, chromatic and spatial opponency is constructed for the red/green, green/red, blue/yellow, and yellow/blue colour pairs in our model.
The individuals of the MTG underwent a bimanual activities of a protocol (2 sets of 10 repetitions with (i) flexion and extension of the shoulder, elbow and wrist, (ii) abduction and adduction of the shoulder, (iii) pronation and supination of the elbow, (iv) flexion with horizontal abduction and flexion with horizontal adduction of shoulders, and (v) flexion and extension of the elbow in supine position with the palm of closed hand and with opponency of the fingers, drawing in the air a circle, a triangle, a square, and a rectangle, in the seated position on a chair.
010 CORTICAL COMPETITION MODELS FOR COUPLED REALISTIC SPIKING NEURONS WITH HODGKIN-HUXLEY DYNAMICS: APPLICATIONS TO HUE OPPONENCY. Vincent A.