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The peacock's long, iridescent tail is a classic secondary sex characteristic that helps attract mates.
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The peacock's long, iridescent tail is a classic secondary sex characteristic that helps attract mates.
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Related words
secondary sex characteristic
Noun
Japanese Meaning
種の二つの性（雄と雌）を区別するが、生殖器系の直接の一部ではない特徴。例えば、体毛のパターンや体形、声の高さなどが含まれる。
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