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ellipsometer

[ ih-lip-som-i-ter, el-ip-, ee-lip- ]
/ ɪ lɪpˈsɒm ɪ tər, ˌɛl ɪp-, ˌi lɪp- /
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noun Optics.
an instrument that measures the ellipticity of polarized light, used for determining the thickness of thin films.
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Origin of ellipsometer

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022
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