plano-convex

American  

[pley-noh-kon-veks, -kon-veks, -kuhn-] / ˌpleɪ noʊˈkɒn vɛks, -kɒnˈvɛks, -kən- /

adjective

Optics.

1. pertaining to or noting a lens that is plane on one side and convex on the other.

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plano-convex British  

/ ˌpleɪnəʊˈkɒnvɛks /

adjective

1. (of a lens) having one side convex and the other side plane

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Etymology

Origin of plano-convex

First recorded in 1655–65; plano- ¹ + convex

Example Sentences

A complete plano-convex ingot has been uncovered in Sweden for the first time.

From Science Daily • Nov. 23, 2025

To test the new method, the researchers first created a simple plano-convex lens and showed that it had an imaging resolution comparable to a commercial glass lens with the same physical dimensions.

From Science Daily • May 9, 2024

Figure 27.35 “Newton's rings” interference fringes are produced when two plano-convex lenses are placed together with their plane surfaces in contact.

From Textbooks • Aug. 12, 2015

Usually three nuts in each bur, the center one flattened by compression, the two outer ones plano-convex.

From The Nut Culturist A Treatise on Propogation, Planting, and Cultivation of Nut Bearing Trees and Shrubs Adapted to the Climate of the United States by Fuller, Andrew S.

Cotyledons plano-convex; radicle pointing to the apex of the fruit.

From The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee by Gray, Asa