Akademik

planoconcave
Flat on one side and concave on the other; denoting a lens of that shape.

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adj.
describing a structure, such as a lens, that is flat on one side and concave on the other.

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pla·no·con·cave (pla″no-kon-kāvґ) flat on one side and concave on the other; see under lens.

Medical dictionary. 2011.