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amorphous

[ uh-mawr-fuhs ]
/ əˈmɔr fəs /
||
SEE MORE SYNONYMS FOR amorphous ON THESAURUS.COM

adjective

lacking definite form; having no specific shape; formless: the amorphous clouds.
of no particular kind or character; indeterminate; having no pattern or structure; unorganized: an amorphous style; an amorphous personality.
Petrography, Mineralogy. occurring in a mass, as without stratification or crystalline structure.
Chemistry. not crystalline.
Biology. having structural components that are not clearly differentiated, as the nuclear material in certain bacteria.

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RELATED WORDS

vague, nebulous, baggy, formless, inchoate, indeterminate, irregular, nondescript, shapeless, unformed, unstructured, unshaped, characterless

Nearby words

amorous, amorously, amorph, amorphia, amorphism, amorphous, amort, amort., amortisation, amortise, amortization

Origin of amorphous

First recorded in 1725–35, amorphous is from the Greek word ámorphos shapeless. See a-6, -morph, -ous
Related formsa·mor·phous·ly, adverba·mor·phous·ness, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for amorphous

British Dictionary definitions for amorphous

amorphous

/ (əˈmɔːfəs) /

adjective

lacking a definite shape; formless
of no recognizable character or type
(of chemicals, rocks, etc) not having a crystalline structure
Derived Formsamorphism, nounamorphously, adverbamorphousness, noun

Word Origin for amorphous

C18: from New Latin, from Greek amorphos shapeless, from a- 1 + morphē shape
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 amorphous

amorphous

adj.

"shapeless," 1731, from Modern Latin amorphus, from Greek amorphos "without form, shapeless, deformed," from a- "without" (see a- (3)) + morphe "form" (see Morpheus). Related: Amorphously; amorphousness.

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for amorphous

amorphous

[ ə-môr′fəs ]

adj.

Lacking definite form; shapeless.
Lacking organization; formless.
Lacking distinct crystalline structure.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for amorphous

amorphous

[ ə-môr′fəs ]

Not made of crystals. Glass, amber, and plastics are amorphous substances.
Lacking definite form or shape.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.