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regulant

[ reg-yuh-luhnt ]
/ ˈrɛg yə lənt /
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noun
a substance, as a chemical, used to control or regulate: herbicides and fungicides as regulants for plant growth.
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Which of the following nouns has an irregular plural form?

Origin of regulant

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