rare-factive

noun

the act or process of rarefying.

the state of being rarefied.

Origin:
1595–1605; < Medieval Latin rārēfactiōn- (stem of rārēfactiō), equivalent to Latin rārēfact(us) (past participle of rārēfacere; see rarefy) + -iōn- -ion

Related forms

rar·e·fac·tion·al, adjective

rar·e·fac·tive

[rair-uh-fak-tiv] , adjective

Can be confused: diffraction, diffusion, reflection, rarefaction, refraction.

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Link To rare-factive

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Rare-factive is always a great word to know.

So is slumgullion. Does it mean:

a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.

a stew of meat, vegetables, potatoes, etc.

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Collins

World English Dictionary

rarefaction or rarefication (ˌrɛərɪˈfækʃən, ˌrɛərɪfɪˈkeɪʃən)

—n
	the act or process of making less dense or the state of being less dense

rarefication or rarefication

—n

rare'factional or rarefication

—*adj*

rarefi'cational or rarefication

—*adj*

rare'factive or rarefication

—*adj*

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage

Medical Dictionary

rarefaction rar·e·fac·tion (râr'ə-fāk'shən)
n.
A decrease in density and pressure in a medium, such as air, caused by the passage of a sound wave.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage

Science Dictionary

rarefaction

(râr'ə-fāk'shən) Pronunciation Key

A decrease in density and pressure in a medium, such as air, especially when caused by the passage of a wave, such as a sound wave.
The region in which this occurs.

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"Rich and rare were the gems she wore,
And a bright gold ring on her hand she bore."

-Thomas Moore

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