doubly labeled water en · NOUN
Meanings
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(US, physical, uncountable) Water where both the hydrogen and oxygen atoms have been replaced by less common isotopes.
Deuterium oxide-18 (D₂¹⁸O or ²H₂¹⁸O) is one kind of doubly labeled water.
Relateds
tritiated water · deuterium · deuterium oxide · oxygen-18 · oxygen-17 · heavy water