a positively charged particle consisting of two protons and two neutrons, emitted in radioactive decay or nuclear fission; the nucleus of a helium atom.
QUIZ YOURSELF ON AFFECT VS. EFFECT!
In effect, this quiz will prove whether or not you have the skills to know the difference between “affect” and “effect.”
Question 1 of 7
The rainy weather could not ________ my elated spirits on my graduation day.
Origin of alpha particle
First recorded in 1900–05
Words nearby alpha particle
, alpha male
, alpha particle
, alpha privative
, alpha radiation
, alpha ray
, alpha receptor
, alpha rhythm
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
Example sentences from the Web for alpha particle
Alpha Team was killed, Faal told the FBI, while the Bravo members who were not gunned down fled.
The conspirators were split into two teams, “Alpha” and “Bravo.”
And when that happens, one “alpha dog” will run the show, usually the oldest, most experienced performer, who “knows more tricks.”
Former RSD instructor Nathan Kole says he saw firsthand how this “alpha male” marketing can damage students.
Lohse rushes Sigma Alpha Epsilon, gets a bid, endures pledge term, and then submits to the dehumanizing rigors of Hell Night.
This, as a piece of pure economics, does not interest the individual employer a particle.
I can tell you, my dear idealist—you have not changed a particle, by the way—that there is another side you have never seen.
Let us conceive a particle of air situated immediately over the earth's polar axis.
Then let us imagine the particle moving toward the equator with the speed of an ordinary wind.
It was a hair-raising problem, too, and called for every ounce of nerve and every particle of skill the boy possessed.
a helium-4 nucleus, containing two neutrons and two protons, emitted during some radioactive transformations
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
A positively charged nuclear particle, indistinguishable from a helium atom nucleus and consisting of two protons and two neutrons.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
A positively charged particle that consists of two protons and two neutrons bound together. It is emitted by an atomic nucleus undergoing radioactive decay and is identical to the nucleus of a helium atom. Because of their relatively large mass, alpha particles are the slowest and least penetrating forms of nuclear radiation. They can be stopped by a piece of paper. See more at radioactive decay.
The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.