per-


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per-

 word element [L.]
1. throughout; completely; extremely.
2. in chemistry, a large amount; combination of an element in its highest valence.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

per-

Do not confuse this prefix with peri-.
1. Through, conveying intensity.
See also: peroxy-.
2. In chemistry, a prefix denoting either 1) more or most, with respect to the amount of a given element (usually oxygen, as in perchloric acid) or radical contained in a compound, or 2) the degree of substitution for hydrogen, as in peroxides, peroxy acids (for example, hydrogen peroxide, peroxyformic acid).
See also: peroxy-.
[L. through, throughout, extremely]
Farlex Partner Medical Dictionary © Farlex 2012

per-

1. Prefix meaning through; denoting intensity.
2. chemistry More or most, with respect to the amount of a given element or radical contained in a compound; the degree of substitution for hydrogen, as in peroxides, peroxy acids (e.g., hydrogen peroxide, peroxyformic acid).
See also: peroxy-
[L. through, throughout, extremely]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

per-

prefix denoting thorough, very, extremely.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005