len·til 
(lĕntəl)
(lĕntəl)n.
1. A leguminous plant (Lens culinaris) native to southwest Asia, having flat pods containing lens-shaped, edible seeds.
2. The round, flattened seed of this plant.
[Middle English, from Old French lentille, from Vulgar Latin *lentīcula, from Latin lenticula, diminutive of lēns, lent-, lentil.]