¹ *Source: wiktionary.com*

### Definition of Involutions

**1.** involution [n] - See also: involution

### Involutions Pictures

Click the following link to bring up a new window with an automated collection of images related to the term: **Involutions Images**

### Lexicographical Neighbors of Involutions

### Literary usage of Involutions

Below you will find example usage of this term as found in modern and/or classical literature:

**1.** *Projective Geometry* by Oswald Veblen, John Wesley Young (1918)

"Thus the theorem on **involutions** may be stated as follows: ... The double points
of the **involutions** may be either proper or improper (real or imaginary). ..."**2.** *An Elementary Treatise on Pure Geometry with Numerous Examples* by John Wellesley Russell (1905)

"Given two involution ranges on a conic or on a line, or two involution pencils
at a point; find the pair of points or lines belonging to both **involutions**. ..."**3.** *Projective Geometry* by Linnaeus Wayland Dowling (1917)

"Hyperbolic **involutions**.— 1. If an involution is hyperbolic, no pair of corresponding
elements is separated by any other pair of corresponding elements; ..."**4.** *Amphioxus and the Ancestry of the Vertebrates* by Arthur Willey (1894)

"... and A (rial **involutions**. By the time that the cerebral vesicle of the Ascidian
embryo with its contained sense-organs (eye and otocyst) is approaching ..."**5.** *Lectures on the Geometry of Position* by Theodor Reye (1898)

"If some of the **involutions** are elliptic and others hyperbolic, their centres P
... If all of these **involutions** are hyperbolic, we call the web hyperbolic; ..."**6.** *An Elementary Treatise on Pure Geometry: With Numerous Examples* by John Wellesley Russell (1893)

"The line joining the two poles Ol 02 of the **involutions** on the conic evidently
cuts the conic in the required pair of points. ..."**7.** *Growth During School Age: Its Application to Education* by Paul Godin (1920)

"Augmented growth, reduced or arrested growth, total growth or appearance of
organs, disappearance of organs, **involutions**.— Embryogenic function of puberty, ..."