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ag·nus cas·tus | \ ¦ag-nəs-ˈka-stəs \
plural agnus castuses
Definition of agnus castus
2 : an extract of the fruit of the chaste tree used in herbal medicine : chaste tree sense 2 In one trial, 48 women (aged between 23 and 29) diagnosed with infertility took agnus castus once daily for three months.— Marilyn Glenville, Boost Your Fertility, 2009
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The first known use of agnus castus was in the 14th century
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