heifer[
'hefә]
n. 
母牛
heifer[ noun ]young cow<noun.animal> 
Heifer \Heif"er\, n. [OE. hayfare, AS. he['a]hfore, he['a]fore;
the second part of this word seems akin to AS. fearr bull,
ox; akin to OHG. farro, G. farre, D. vaars, heifer, G.
f["a]rse, and perh. to Gr. ?, ?, calf, heifer.] (Zo["o]l.)
A young cow.