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[mohlt] /moʊlt/
verb (used without object)
(of birds, insects, reptiles, etc.) to cast or shed the feathers, skin, or the like, that will be replaced by a new growth.
verb (used with object)
to cast or shed (feathers, skin, etc.) in the process of renewal.
an act, process, or an instance of molting.
something that is dropped in molting.
Also, especially British, moult.
Origin of molt
1300-50; earlier mout (with intrusive -l-; cf. fault, assault), Middle English mouten, Old English -mūtian to change (in bi-mūtian to exchange for) < Latin mūtāre to change; see mutate
Related forms
molter, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for molted


verb, noun
the usual US spelling of moult
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 molted



also moult, mid-14c., mouten, of feathers, "to be shed," from Old English *mutian "to change" (cf. bemutian "to exchange"), from Latin mutare "to change" (see mutable). Transitive sense, of birds, "to shed feathers" is first attested 1520s. With parasitic -l-, late 16c., on model of fault, etc. Related: Molted, moulted; molting, moulting. As a noun from 1815.

Online Etymology Dictionary, © 2010 Douglas Harper
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molted in Medicine

molt (mōlt)
v. molt·ed, molt·ing, molts
To shed periodically part or all of a coat or an outer covering, such as feathers, cuticle, or skin, which is then replaced by a new growth. n.

  1. The act or process of molting.

  2. The material cast off during molting.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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molted in Science
To shed an outer covering, such as skin or feathers, for replacement by a new growth. Many snakes, birds, and arthropods molt.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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