Let"tuce (l&ebreve;t"t&ibreve;s), n. [OE. letuce, prob. through Old French from some Late Latin derivative of L. lactuca lettuce, which, according to Varro, is fr. lac, lactis, milk, on account of the milky white juice which flows from it when it is cut: cf. F. laitue. Cf. Lacteal, Lactucic.] (Bot.) A composite plant of the genus Lactuca (L. sativa), the leaves of which are used as salad. Plants of this genus yield a milky juice, from which lactucarium is obtained. The commonest wild lettuce of the United States is L. Canadensis.

Hare's lettuce, Lamb's lettuce. See under Hare, and Lamb. - - Lettuce opium. See Lactucarium. - - Sea lettuce, certain papery green seaweeds of the genus Ulva.

LETTUCE, n. An herb of the genus Lactuca, "Wherewith," says that
pious gastronome, Hengist Pelly, "God has been pleased to reward the
good and punish the wicked. For by his inner light the righteous man
has discerned a manner of compounding for it a dressing to the
appetency whereof a multitude of gustible condiments conspire, being
reconciled and ameliorated with profusion of oil, the entire
comestible making glad the heart of the godly and causing his face to
shine. But the person of spiritual unworth is successfully tempted to
the Adversary to eat of lettuce with destitution of oil, mustard, egg,
salt and garlic, and with a rascal bath of vinegar polluted with
sugar. Wherefore the person of spiritual unworth suffers an
intestinal pang of strange complexity and raises the song."