a longitudinal earthquake wave that travels through the interior of the earth and is usually the first conspicuous wave to be recorded by a seismograph.
Why Are We Calling Everything A “Wave”?Why have so many waves found their way into our cultural lexicon in recent years? In this article, the first in the column Mincing Metaphors, we unpack this oceanic metaphor to better understand what it means and why it’s proving so useful right now.
Were P And R Once The Same Letter?Do you ever stop and look at the shape of our alphabet? Each letter looks natural to us now, but all those lines and circles have unique histories. It’s easy to make assumptions that our letters make sense, that they developed in some orderly logical way, and one reasonable assumption would be that P and R are related to each other based on their form. …
Origin of P wave
First recorded in 1935–40
Also called primary wave.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Word Origin and History for p wave
1908 in geology, the p representing primary (adj.).
Online Etymology Dictionary, © 2010 Douglas Harper
Medicine definitions for p wave
A deflection in an electrocardiogram indicating depolarization of the atria.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Science definitions for p wave
See primary wave.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.