Find the word definition

The Collaborative International Dictionary
Vitex agnus castus

Agnus castus \Ag"nus cas"tus\ [Gr. ? a willowlike tree, used at a religious festival; confused with ? holy, chaste.] (Bot.) A species of Vitex ( Vitex agnus castus); the chaste tree.
--Loudon.

And wreaths of agnus castus others bore.
--Dryden. [1913 Webster] ||