Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of plano-concave is as below...

Plano-concave :: Plano-concave (a.) Plane or flat on one side, and concave on the other; as, a plano-concave lens. See Lens..

Plano- :: Plano- (a.) Combining forms signifying flat, level, plane; as planifolious, planimetry, plano-concave..

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