variation

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var·i·a·tion

(var'ē-ā'shŭn),
1. Deviation from type, especially the parent type, in structure, form, physiology, or behavior.
2. Synonym(s): type (3)
[L. variatio, fr. vario, to change, vary]
Farlex Partner Medical Dictionary © Farlex 2012

variation

(vâr′ē-ā′shən, văr′-)
n.
1.
a. The act, fact, or process of varying.
b. The extent or degree to which something varies: a variation of ten pounds in weight.
2. Biology The existence within a species or other group of organisms of differences in form, function, or behavior, especially when hereditary.

var′i·a′tion·al adj.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

var·i·a·tion

(var'ē-ā'shŭn)
Deviation from the type, especially the parent type, in structure, form, physiology, or behavior.
[L. variatio, fr. vario, to change, vary]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

variation

  1. ecophenotypic variation (see ECOPHENOTYPE caused by local factors, as opposed to genetic factors, in an organism.
  2. any differences (both genotypic and phenotypic) between individuals in a population or between parents and their offspring. see GENETIC VARIABILITY.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
Because VORs are updated at different times, you can find very different inbound and outbound courses on a victor airway because of different magnetic variation.
Airport magnetic variation is updated more frequently than VORs to maintain approach criteria.
The magnetic variation used in charts also varies depending on the situation.
Researchers who learn to control the chaotic amplification of tiny fluctuations in the magnetic environment may find themselves able to sense extremely small magnetic variations in biological tissues and other samples.
Solar magnetic variations leave a long-term record in the form of carbon-14 in tree rings, she notes, because when the magnetism is stronger, less carbon-14 is produced in Earth's upper atmosphere and less finds its way into the tree rings.