from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Convex on both sides; biconvex. Used of a lens.
from the GNU version of the Collaborative International Dictionary of English
- adj. Convex on both sides; double convex. See under convex, a.
from The Century Dictionary and Cyclopedia
- Convex on both sides, as a lens: otherwise termed doubleconvex.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. convex on both sides; shaped like a lentil
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