feather是不是可数名词?

是不可数名词。
 

记得是鸟得羽毛。加了S是不可数名词。
 

feather 指的是羽毛 不可数的
feathers 意思是 羽毛状的
 

你看下 希望对你有帮助
feather
[5feTE]
n.
翎毛, 轻的东西, 羽毛
vi.
长羽毛
vt.
用羽毛装饰, 射掉(飞禽)的羽毛
feather
feath.er
AHD:[fµY“…r] 
D.J.[6feH*]
K.K.[6fWH+]
n.（名词）
One of the light, flat growths forming the plumage of birds, consisting of numerous slender, closely arranged parallel barbs forming a vane on either side of a horny, tapering, partly hollow shaft.
羽毛：构成鸟类羽毛的轻且平的一种生长物，由大量细长的、紧密并列的钩在一个角状的、中空的锥形羽轴两边所形成的羽片
feathers Plumage.
 feathers 羽衣
feathers Clothing; attire.
 feathers 外衣；装束
A feathery tuft or fringe of hair, as on the legs or tail of some dogs.
丛毛：软软的一束垂毛，如在某些狗的腿部或尾部
Character, kind, or nature:
类别：种类、特点或本性：
Birds of a feather flock together.
物以类聚
Something small, trivial, or inconsequential.
琐事：小的、轻的或不重要的事
A strip, wedge, or flange used as a strengthening part.
滑键：用作加强部件的木条、楔子或凸橼
A wedge or key that fits into a groove to make a joint.
加强肋：作为连接物填入槽内的楔形物或舌状物
The vane of an arrow.
箭翎：箭上的羽片
A feather-shaped flaw, as in a precious stone.
羽状瑕疵：宝石中的羽状裂痕的微瑕
The wake made by a submarine's periscope.
微波：潜水艇的浅望镜在水中造成的波浪
The act of feathering the blade of an oar in rowing.
横桨：桨面在划水时的羽状动作