Sundew \Sun"dew`\, n. (Bot.) Any plant of the genus Drosera, low bog plants whose leaves are beset with pediceled glands which secrete a viscid fluid that glitters like dewdrops and attracts and detains insects. After an insect is caught, the glands curve inward like tentacles and the leaf digests it. Called also lustwort.

Source: Webster's Revised Unabridged Dictionary (1913)