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ellipsometer

American  
[ih-lip-som-i-ter, el-ip-, ee-lip-] / ɪ lɪpˈsɒm ɪ tər, ˌɛl ɪp-, ˌi lɪp- /

noun

Optics.

  1. an instrument that measures the ellipticity of polarized light, used for determining the thickness of thin films.

Etymology

Origin of ellipsometer

ellipse + -o- + -meter

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.