A plano-convex lens is a positive lens with one surface flat and the other convex. In the dictionary, plano is given only as a combining form, but in practical optics it is often used alone to denote any particularly flat surface-- that has been worked flat.
See: optical flat.
Origin: L. Planus.
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... Data Systems (EDS), was in trouble because the Pentagon was behind by $1.8 billion in payments on a multi-billion dollar contract it has with the Plano based company. But it’s unlikely this setback to EDS will kill the project nor buck current trends of massive DOD contracts awarded to Texas companies ...
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