beestings
The first milk drawn from an animal (especially a cow) after it has given birth.
[W]ith thy Sickle reap the rankeſt land: / And miniſter the Blade, vvith bounteous hand. / Nor be vvith harmful parſimony vvon / To follovv vvhat our homely Sires have done; / VVho fill'd the Pail vvith Beeſtings of the Covv: / But all her Udder to the Calf allovv.
Where it comes from
From Old English bȳsting, derived from bēost, from Proto-West Germanic *beust.
Adapted from the Wiktionary entry beestings (CC BY-SA 4.0).