Lewis & Short

Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.

agnŏs, i, f., = ἄγνος (cf. ἁγνός, chaste), a tall plant resembling the willow, the chastetree: agnus castus, Plin. 24, 9, 38, § 59.