Of a calf, lamb, etc.: newly dropped, newborn. Obsolete.
appositive or as adj. That is a yeanling; young or new-born: esp. of a lamb. Also figurative.
Young and undeveloped; esp. of young birds, unfledged or not fully fledged, newly or lately hatched.
A calf or lamb weaned during the current year; also, a pig or any other animal weaned during the current year. Also attributive. Cf. weanyer, n.…