plano concave


[pley-noh-kon-keyv, -kon-keyv]
adjective Optics.
pertaining to or noting a lens that is plane on one side and concave on the other.

1685–95; plano-1 + concave Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
plano-concave (ˌpleɪnəʊˈkɒnkeɪv)
(of a lens) having one side concave and the other side plane

Collins English Dictionary - Complete & Unabridged 10th Edition
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