beest·ings also beast·ings 
(bēstĭngz)
(bēstĭngz)pl.n. (used with a sing. or pl. verb)
The first milk secreted by a mammal, especially a cow, after parturition; colostrum.
[Middle English bestinggis, pl. of besting, from Old English bȳsting, from bēost, beestings.]