pentaprism

noun
pen·​ta·​prism | \ ˈpentə+ˌ- \

Definition of pentaprism

: a pentagonal prism having one angle 90° and the others 112° 30′, producing a constant deviation of 90° for any wavelength, and used as a reflector in range finders

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History and Etymology for pentaprism

penta- + prism

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Cite this Entry

“Pentaprism.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pentaprism. Accessed 27 Jul. 2021.

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