verb (used with object), de-ex·cit·ed, de-ex·cit·ing.
to cause (an atom) to fall from an excited energy level to a lower energy level.
verb (used without object), de-ex·cit·ed, de-ex·cit·ing.
to become de-excited.
Origin of de-excite
First recorded in 1960–65
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019