Involution

In`vo*lu"tion

(?), n. [L. involutio: cf. F. involution. See Involve.]
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1. The act of involving or infolding.
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2. The state of being entangled or involved; complication; entanglement.
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All things are mixed, and causes blended, by mutual involutions.
Glanvill.
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3. That in which anything is involved, folded, or wrapped; envelope. Sir T. Browne.
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4. (Gram.) The insertion of one or more clauses between the subject and the verb, in a way that involves or complicates the construction.
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5. (Math.) The act or process of raising a quantity to any power assigned; the multiplication of a quantity into itself a given number of times; -- the reverse of evolution.
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6. (Geom.) The relation which exists between three or more sets of points, a.a, b.b, c.c, so related to a point O on the line, that the product Oa.Oa = Ob.Ob = Oc.Oc is constant. Sets of lines or surfaces possessing corresponding properties may be in involution.
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7. (Med.) The return of an enlarged part or organ to its normal size, as of the uterus after pregnancy.
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Mon 10th December 2018