udder, bag - mammary gland of bovids (cows and sheep and goats)

Bos taurus, cattle, cows, kine, oxen - domesticated bovine animals as a group regardless of sex or age; "so many head of cattle"; "wait till the cows come home"; "seven thin and ill-favored kine"- Bible; "a team of oxen"

springing cow, springer - a cow about to give birth

heifer - young cow

poll - the part of the head between the ears