GROIN

noun the snout of a swine.

2. groin ·noun the surface formed by two such vaults.

3. groin ·vt to fashion into groins; to build with groins.

4. groin ·noun a frame of woodwork across a beach to accumulate and retain shingle.

5. groin ·vi to grunt to growl; to snarl; to murmur.

6. groin ·noun the line between the lower part of the abdomen and the thigh, or the region of this line; the inguen.

7. groin ·noun the projecting solid angle formed by the meeting of two vaults, growing more obtuse as it approaches the summit.