joule(redirected from Petajoule)
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the SI unit of energy, being the work done by a force of 1 newton acting over a distance of 1 meter.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
A unit of energy; the heat generated, or energy expended, by an ampere flowing through an ohm for 1 sec; equal to 107 ergs and to a newton-meter. It is an approved multiple of the SI fundamental unit of energy, the erg, and is intended to replace the calorie (4.184 J).
Synonym(s): unit of heat (3)
[James P. Joule]
Farlex Partner Medical Dictionary © Farlex 2012
A unit of energy; the heat generated, or energy expended, by an ampere flowing through an ohm for 1 second; equal to 107 ergs and to a newton-meter. It is an approved multiple of the SI fundamental unit of energy, the erg, and is intended to replace the calorie (4.184 J).
[James P. Joule]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
jouleA unit of work, energy and heat. A watt-second. The joule is being used increasingly to replace the CALORIE in nutritional contexts. The calorie is equal to 4.187 J. (James Prescott Joule, 1818–89, English physicist).
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005
joulean SI unit of energy equal to 107 ergs or 0.239 cals. Named after the physicist J.P. Joule (1818–89) who determined the mechanical equivalent of heat and showed that 4.2×107 ergs = 1 calorie (4.2 joules = 1 cal.).
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
Joule,James P., English physicist, 1818-1889.
joule - Synonym(s): unit of heat
Joule equivalent - the dynamic equivalent of heat.
Medical Eponyms © Farlex 2012