[adjective, noun in-vuh-loot; verb in-vuh-loot, in-vuh-loot]



Geometry. any curve of which a given curve is the evolute.

verb (used without object), in·vo·lut·ed, in·vo·lut·ing.

to roll or curl up; become involute.
to return to a normal shape, size, or state.

Origin of involute

1655–65; < Latin involūtus (past participle of involvere to roll up, wrap, cover), equivalent to in- in-2 + volū- (variant stem of volvere to roll) + -tus past participle suffix; cf. involve
Related formsin·vo·lute·ly, adverbsub·in·vo·lute, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for involute

Historical Examples of involute

  • But the involute edges of the pileus are bearded with close hairs.

    Mushroom Culture

    W. Robinson

  • Involute: ridgeless, with flanking lines, but no keel; soft and rather thick.


    H. Marshall Ward

  • Involute, in vernation, 72; rolled inwards from the edges, 97.

  • The margin of the cap is smooth and turned under at first (involute).

    Among the Mushrooms

    Ellen M. Dallas and Caroline A. Burgin

  • The body is ornamented with carelessly drawn, deeply incised, involute designs.

British Dictionary definitions for involute


adjective (ˈɪnvəˌluːt) involuted

complex, intricate, or involved
botany (esp of petals, leaves, etc, in bud) having margins that are rolled inwards
(of certain shells) closely coiled so that the axis is obscured

noun (ˈɪnvəˌluːt)

geometry the curve described by the free end of a thread as it is wound around another curve, the evolute, such that its normals are tangential to the evoluteSee also evolute

verb (ˌɪnvəˈluːt)

(intr) to become involute
Derived Formsinvolutely, adverbinvolutedly, adverb

Word Origin for involute

C17: from Latin involūtus, from involvere; see involve
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 involute

early 15c., from Latin involutus "rolled up, intricate, obscure," past participle of involvere (see involve).

Online Etymology Dictionary, © 2010 Douglas Harper