| hematoma | <haematology, pathology> A localised collection of blood, usually clotted, in an organ, space or tissue, due to a break in the wall of a blood vessel. (18 Nov 1997) |
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| perianal | <anatomy> Located around the anus. Origin: L. Anus (18 Nov 1997) |
| perianal abscess | <surgery> An abscess that forms adjacent to the anal opening. Symptoms include a tender swelling adjacent to the anus and pain on defecation. (27 Sep 1997) |
| perianal odouriferous glands | Exocrine glands in animals which secrete scents which either repel or attract other animals, e.g. Perianal glands of skunks, anal glands of weasels, musk glands of foxes, ventral glands of wood rats, and dorsal glands of peccaries. (12 Dec 1998) |