Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • adjective Flat on one side and concave on the other.

from The Century Dictionary.

  • Plane on one side and concave on the other.

from the GNU version of the Collaborative International Dictionary of English.

  • adjective Plane or flat on one side, and concave on the other. See lens.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adjective flat on one side and concave on the other

Etymologies

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Examples

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