groin Definition

groin
noun

1. The part of the body where the lower abdomen joins the upper thigh.
2. euphemistic
The male sex organs.
3. archit.
The edge formed by the joining of two vaults in a roof; the rib covering the intersection.

verb

groined, groining
1. archit.
To build (a vault, etc) with groins.

Derivative: groined
adj

Derivative: groining
noun

Etymology: 15c as grynde.