• WordNet 3.6
    • n Planera a deciduous tree of the family Ulmaceae that grows in the southeastern United States
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Century Dictionary and Cyclopedia
    • n planera A genus of plants of the order Urticaceæ and tribe Ulmeæ. It is characterized by the fruit, which is wingless, ovoid, nut-like, keeled, and roughened, thick and coriaceous or somewhat fleshy, and containing one cell and one seed. There is but one species, native of North America. See planer-tree.
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In literature:

Planera carpinifolia, Watson, Dend.
"Scientific American Supplement, No. 417" by Various