1) Around the anus 2) Opening 3) Orifice 4) Porta 
(peri- + L. anus anus) located around the anus.
The area around the anus.
<anatomy> Located around the anus. ... Origin: L. Anus ... (18 Nov 1997) ... 
(per″e-a´nәl) around the anus.
Type: Term Pronunciation: per′ē-ā′năl Synonyms: circumanal
Perianal: Located around the anus, the opening of the rectum to the outside of the body. Peri- is a prefix borrowed from the Greek. It means 'around or about.' So pericardial is around the heart. Perinatal is around birth. And periumbilical is around the umbilicus (the belly button). Peri- is a useful prefix in anatomy and so is much employed in me...
To be found around the anus
In the region of the anus.
[adj] - around the anus
perianal Around or close to the anus.
adjective around the anus
adjective, Greek peri = around, and Latin anus = lower opening of alimentary canal.
The region around the anus.