or Lamb, in zoology, the young of the ovis or sheep. See Ovis.

AGNUS Cætus, in botany, the trivial name of a species of the vitex. See Vitex. The Greeks call it ἀγνός, chafte; to which has since been added the reduplicative cætus, g. d. chafte chafte. It was famous among the ancients as a specific for the preservation of chastity. The Athenian ladies, who made profession of chastity, lay upon leaves of agnus caetus during the feasts of Ceres.—Being reputed a cooler, and particularly of the genital parts, it was anciently used in physic to allay those inordinate motions arising from seminal turgescences: but it is out of the present practice.