pertaining to or noting a lens that is plane on one side and concave on the other.
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How to use plano-concave in a sentence
The achromatic lens consists of a double convex lens of crown glass combined with a plano-concave lens of flint glass.Physics | Willis Eugene Tower
And the correction is produced by the same plano-concave lens as that which corrects the spherical aberration.An Elementary Text-book of the Microscope | John William Griffith
The chromatic combination consists of a convex lens of crown backed by a concave, or plano-concave, lens of flint.Pleasures of the telescope | Garrett Serviss
If one of the radii becomes infinite, the lens is plano-concave (fig. 9, 5).
I have made another only with a plano concave, without any kind of reflection, divers also by means of reflection.Micrographia | Robert Hooke
British Dictionary definitions for plano-concave
(of a lens) having one side concave and the other side plane
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