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 (D) [doo-tēr´e-um]
the mass 2 isotope of hydrogen; it is available as a gas or heavy water and has been used as a tracer or indicator in metabolic studies.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

hy·dro·gen 2

(2H) (hī'drō-jen)
The isotope of hydrogen 2 of atomic weight 2; the less common stable isotope of hydrogen-2 making up 0.015% of the hydrogen-2 atoms occurring in nature.
Synonym(s): deuterium.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012


1. Gaseous element, atomic no. 1, atomic wt. 1.00794.
2. Molecular form (H2) of the element.
[hydro- + G. -gen, producing]
Medical Dictionary for the Dental Professions © Farlex 2012