Webster's Revised Unabridged Dictionary · 1913

Agnus castus

Agnus castus ({not transcribed})

[Greek {not transcribed} a willowlike tree, used at a religious festival; confused with {not transcribed} holy, chaste.]

(Botany) A species of Vitex (Vitex agnus castus); the chaste tree. — Loudon
And wreaths of agnus castus others bore. — Dryden