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Any plant of the genus Sisyrinchium (family Iridaceae), comprising annual or perennial herbaceous plants native to the New World, bearing linear leaves and clusters of small blue, yellow, red, or white flowers; also called blue-eyed grass. Also (in form Sisyrinchium): the genus itself.
Early 17th century (in an earlier sense). From post-classical Latin sisyrinchium from classical Latin sisyrinchion plant with an edible bulb or corm, perhaps Moraea sisyrinchium (Pliny) from Hellenistic Greek σισυρίγχιον (Theophrastus), of unknown origin.