Pronunciation: ˈaŋɡ(ə)l ɒv;(ə)v rɪˈfrakʃ(ə)n
Parts of Speech: noun
the angle between a refracted ray and a line perpendicular to the surface between the two media at the point of refraction
Definition: Meaning of, belt down in English to English dictionary.
Pronunciation: / bɛlt daʊn /
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| [transitive] [mainly American English] [informal] |