involute adjective & noun. ['ɪnvǝl(j)u:t] M17.
[Latin involutus pa. pple of involvere INVOLVE.]
A. adjective.
1. Involved; entangled; intricate. Formerly also, hidden, obscure. M17.

2. Chiefly Zoology. Rolled up in a spiral; esp. (of a shell) having the whorls wound closely round the axis. M17.

3. Math. In the form of an involute. E18.

4. Botany. Of a leaf etc.: rolled inwards at the edges. M18.
b. noun. Math. A curve such as is traced out by a point on a taut string unwound from a given curve in the plane of that curve. Cf. EVOLUTE noun & adjective. L18.

[TahlilGaran] English Dictionary ▲

involute verb intrans. ['ɪnvǝl(j)u:t] E20.
[Back-form. from INVOLUTED.]
Chiefly Physiology. Shrink, fold in upon itself; undergo involution.

[TahlilGaran] English Dictionary ▲