Lentil (noun)

1. A round flat seed of a leguminous plant, used as food, typically as a pulse.
2. A plant of the pea family, which is grown for its lens-shaped seeds.

Origin:

Old english lentil, from latin lens, lent- "lentil", from the base of linquere "to leave".

Examples:

1. The lentil soup was a staple in the winter months.
2. The lentil is a good source of protein and fiber.
3. The lentil plants were grown in the field.
4. The lentil sprouts were added to the salad.
5. The lentil seeds were dried and stored for later use.