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clump

[kluhmp] /klʌmp/
noun
1.
a small, close group or cluster, especially of trees or other plants.
2.
a lump or mass.
3.
a heavy, thumping step, sound, etc.
4.
Immunology. a cluster of agglutinated bacteria, red blood cells, etc.
5.
a thick extra sole on a shoe.
verb (used without object)
6.
Also, clomp. to walk heavily and clumsily.
7.
Immunology. to gather or be gathered into clumps; agglutinate.
verb (used with object)
8.
to gather or form into a clump; mass.
Origin
1580-1590
1580-90; akin to Dutch klompe lump, mass, Old English clympre lump of metal
Related forms
clumpy, clumpish, clumplike, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for clumping

clump

/klʌmp/
noun
1.
a cluster, as of trees or plants
2.
a dull heavy tread or any similar sound
3.
an irregular mass a clump of hair or earth
4.
an inactive mass of microorganisms, esp a mass of bacteria produced as a result of agglutination
5.
an extra sole on a shoe
6.
(slang) a blow
verb
7.
(intransitive) to walk or tread heavily
8.
to gather or be gathered into clumps, clusters, clots, etc
9.
to cause (bacteria, blood cells, etc) to collect together or (of bacteria, etc) to collect together
10.
(transitive) (slang) to punch (someone)
Derived Forms
clumpy, adjective
clumpiness, noun
Word Origin
Old English clympe; related to Middle Dutch klampe heap of hay, Middle Low German klampeclamp², Swedish klimp small lump
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
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Word Origin and History for clumping
clump
1586, from Du. klomp "lump, mass," or Low Ger. klump. O.E. had clympre "lump, mass of metal." The verb "to tread heavily" is first recorded 1665.
Online Etymology Dictionary, © 2010 Douglas Harper
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clumping in Medicine

clumping clump·ing (klŭm'pĭng)
n.
The massing together of bacteria or other cells suspended in a fluid.

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