noun [ U ]
1.
( chemistry ) water that contains the normal amount of deuterium
—compare heavy water
2.
( technical ) a type of foam (= mass of bubbles) used to put out fires
noun [ U ]
1.
( chemistry ) water that contains the normal amount of deuterium
—compare heavy water
2.
( technical ) a type of foam (= mass of bubbles) used to put out fires
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005