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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] ||

Wiktionary
agnus castus

n. A tree, ''Vitex agnus-castus'', formerly believed to preserve chastity.

Usage examples of "agnus castus".

The name 'Castor' was indeed originally applied about this period to the plant in Jamaica, where it seems to have been called 'Agnus Castus,' though it bears no resemblance to the South European plant properly so called.