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semiheavy water

American

noun

Chemistry. water in which one hydrogen atom per molecule is deuterium.

semiheavy water Scientific

/ sĕm′ē-hĕv′ē /

See under heavy water

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.