from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Selection driven by the competition for mates, considered an adjunct to natural selection.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A type of natural selection, where members of the sexes acquire distinct forms either because the members of one sex choose mates with particular features or because in the competition for mates among the members of one sex only those with certain traits succeed.
from the GNU version of the Collaborative International Dictionary of English
- adj. the selective preference of one sex for certain characteristics in the other, such as bright colors, musical notes, etc.; also, the selection which results from certain individuals of one sex having more opportunities of pairing with the other sex, on account of greater activity, strength, courage, etc.; applied likewise to that kind of evolution which results from such sexual preferences.
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