a prefix meaning “through,” “thoroughly,” “utterly,” “very”: pervert; pervade; perfect.
Chemistry. a prefix used in the names of inorganic acids and their salts that possess the maximum amount of the element specified in the base word: percarbonic (H2C2O5), permanganic (HMnO4), persulfuric (H2S2O8), acids; potassium permanganate (KMnO4); potassium persulfate (K2S2O8).
per seRead more in this article about some frequently asked questions and fun facts related to our definitions.
What Character Was Removed From The Alphabet?Johnson & Johnson, Barnes & Noble, Dolce & Gabbana: the ampersand today is used primarily in business names, but that small character was once the 27th part of the alphabet. Where did it come from though? The origin of its name is almost as bizarre as the name itself.
Origin of per-
< Latin, combining form of per per, and used as an intensive
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for per-
indicating that a chemical compound contains a high proportion of a specified elementperoxide; perchloride
indicating that a chemical element is in a higher than usual state of oxidationpermanganate; perchlorate
(not in technical usage) a variant of peroxy- persulphuric acid
Word Origin for per-
from Latin per through
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for per-
word-forming element meaning "through, throughout; thoroughly; entirely, utterly," from Latin preposition per (see per (prep.)).
Online Etymology Dictionary, © 2010 Douglas Harper
Medicine definitions for per-
Thoroughly; completely; intensely:perfuse.
Containing an element in its highest oxidation state:perchloric acid.
Containing a large or the largest possible proportion of an element:peroxide.
Containing the peroxy group:peracid.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.