英语词汇“pin feather”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	pin feather
释义	pin feather noun Ornithology An immature feather, before the veins have expanded and while the shaft is full of fluid.Changes in the physical structure of the pin feather during growth may be the most likely explanation for the increased resistance to heat loss in both groups of birds.... Cockatiels are born nearly naked and pin feathers start to appear at about seven days. On that particular afternoon I recall a lot of references to ‘pin feathers’ interspersed with colorful expletives.
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