• WordNet 3.6
    • n Lepidium cosmopolitan genus of annual and biennial and perennial herbs: cress
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Century Dictionary and Cyclopedia
    • n lepidium A large genus of cruciferous plants, chiefly herbs, of the tribe Lepidineæ, distinguished by the dehiscent pod, which is almost always two-seeded, and by the white flowers. About 100 species have been enumerated, which may be reduced to from 60 to 80, distributed over the warm regions of the world. They are commonly known as peppergrasses.
    • n lepidium In zoology, a genus of thysanurous insects. Also written Lepidion.
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In literature:

Lepidium lasiocarpum (peppergrass) Tr.
"Life History of the Kangaroo Rat" by Charles T. Vorhies and Walter P. Taylor
Lepidium Virginicum, Wild Pepper-grass.
"Seeds of Michigan Weeds" by W. J. (William James) Beal