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arc spectrum
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noun Physics.
a spectrum formed from the light produced by an electric arc, characteristic of the gas or vapor through which the arc passes.
QUIZ
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Test how much you really know about regular and irregular plural nouns with this quiz.
Question 1 of 9
Which of the following nouns has an irregular plural form?
Words nearby arc spectrum
arc sec, arc secant, arc second, arcsin, arc sine, arc spectrum, arc tan, arc tangent, arctation, Arctic, Arctic char
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022