英 [ˈfeðələs] 美 [feðərlɪs]
adj. 无羽毛的
滑键，加强筋； (木板等上供嵌入槽内的)榫牙
平掠回桨：
无羽毛的(featherless), 此释义来源于网络辞典。
无羽毛的
Two featherless chickens peck around in some grass May 22, 2002 at the Hebrew University in Rehovot.
2002年5月22日，2只没有羽毛的小鸡在位于荷霍沃特（以色列中部）的希伯来大学的草地上觅食。
For example, the denotation of human is any person such as John and Mary, and its connotation is "biped", "featherless", "rational", etc.
例如，人的外延是任何人，如约翰和玛丽；内涵是“两足动物”“无羽毛的”“有理性的”等等。
The just-hatched cuckoo, still blind and featherless, has a special hollow like a dimple on its back, so that it can hump out of the nest, one by one, its companion fledglings.
刚孵化的布谷鸟还看不见东西，也没有羽毛，它们的背上有一个特殊的凹陷，就像一个酒窝，通过这个凹陷，它们就可以一个一个地把自己的同伴幼鸟背负出鸟巢。
Since bipeds of the featherless variety generally prefer individual to group mating displays, the benefits of kin selection are less pronounced in humans.