What does "lentil" mean?

Lentil: A leguminous plant of the genus Ervum (Ervum Lens), of small size, common in the fields in Europe. Also, its seed, which is used for food on the continent. Note: The lentil of the Scriptures probably included several other vetchlike plants. Lentil shell (Zoöl.), a small bivalve shell of the genus Ervillia, family Tellinidæ.

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