deuterium oxide


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heav·y wa·ter

D2O; water in which the hydrogen atoms are deuterium, or heavy hydrogen (2H), with physical properties that differ noticeably from those of ordinary water; an elevated presence will cause a decrease in metabolic activity; used as a moderator in nuclear reactors because of its capacity to absorb neutrons.
Synonym(s): deuterium oxide

deuterium oxide

An isotope of water in which hydrogen has been displaced by its isotope deuterium. Its properties differ from ordinary water in that it has higher freezing and boiling points and is incapable of supporting life.
CAS # 7789-20-0
Synonym: heavy water
See also: deuterium
References in periodicals archive ?
Extraction and measurement of deuterium oxide at tracer levels in biological fluids.
Deuterium oxide is thus two atomic mass units heavier than hydrogen oxide.
Moreover, where deuterium oxide dilution requires drawing blood and underwater weighing requires immersion in a calibrated pool, the infrared technique can be completed in three minutes and may ultimately require no more than the rolling up of one's sleeve.