Definition of involute in English:

involute

Line breaks: in|vo¦lute
Pronunciation: /ˈɪnvəl(j)uːt
 
/

adjective

  • 1 formal Involved or intricate: the art novel has grown increasingly involute
  • 2 technical Curled spirally.
  • 2.1 Zoology (Of a shell) having the whorls wound closely round the axis.
    More example sentences
    • Most contemporary goniatitids had an involute shell with compressed whorls.
    • In the Anaspidea there is a tendency for parapodia to enlarge and, together with the mantle, to enclose the fragile shell (with increasingly reduced and involute spire).
    • Although no equatorial sections were recovered, the present specimens exhibit a likely involute initial stage followed by biserial, uncoiled later stage in which chambers are more flattened.
  • 2.2 Botany (Of a leaf or the cap of a fungus) rolled inwards at the edges.
    More example sentences
    • They were found to comprise at least three different traits: involute leaves, early flowering, and Apetala flowers.
    • Distinguishing characteristics are fully double, involute florets that are narrow and pointed.
    • This mutant displayed involute leaves and early flowering, although less than clf and icu2 mutants (20 days after sowing).

noun

Geometry Back to top  
  • The locus of a point considered as the end of a taut string being unwound from a given curve in the plane of that curve. Compare with evolute.
    More example sentences
    • Since normals to a straight line never intersect and tangents coincide with the curve, evolutes, involutes and pedal curves are not too interesting.
    • He defines evolutes and involutes of curves and, after giving some elementary properties, finds the evolutes of the cycloid and of the parabola.
    • Hence a curve has a unique evolute but infinitely many involutes.

Origin

mid 17th century: from Latin involutus, past participle of involvere (see involve).

More definitions of involute

Definition of involute in:

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day skosh
Pronunciation: skəʊʃ
noun
a small amount; a little