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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.


plano-convex British  
/ ˌpleɪnəʊˈkɒnvɛks /

adjective

  1. (of a lens) having one side convex 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

Etymology

Origin of plano-convex

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

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

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

A B, is a plano-convex lens, being flat on one side, and convex on the other.

From Conversations on Natural Philosophy, in which the Elements of that Science are Familiarly Explained by Thomas P. Jones

P. 8-11 cm. plano-convex, unequal, glabrous, yellow; g. decur. broad, eroded, pallid then cinnamon; s.

From European Fungus Flora: Agaricaceae by George Massee

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