opponent

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opponent

Anatomy
1. an opponent muscle
2. (of a muscle) bringing two parts into opposition
References in periodicals archive ?
The reason for this is unclear but could be based upon cone opponency which is known to sharpen spectral sensitivity functions.
The colour hexagon: A chromaticity diagram based on photoreceptor excitations as a generalized representation of colour opponency.
Alternatively, cuttlefish may use opponency processes to extract polarization information (10) by subtracting the responses of units sensitive to vertical e-vectors from ones sensitive to horizontal e-vectors.