• synonyms


[pley-noh-kon-veks, -kon-veks, -kuh n-]
adjective Optics.
  1. pertaining to or noting a lens that is plane on one side and convex on the other.
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Origin of plano-convex

First recorded in 1655–65; plano-1 + convex
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for plano-convex

Historical Examples of plano-convex

  • If the lens is a plano-convex the focal length is twice the radius of its spherical surfaces.

    Wireless Transmission of Photographs

    Marcus J. Martin

  • The two examples with plano-convex cross-sections were unmodified on the plano face except for retouch along the edges.

  • In most plano-convex examples, the plane face is unmodified except for retouch.

  • Plano-convex (L)—a term used to describe an object that is flat on one face and convex on the other.

  • But by passing through the plano-convex glass r in their way they form that extremity of the image at b.

British Dictionary definitions for plano-convex


  1. (of a lens) having one side convex and the other side plane
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012