caudal appendage

English Thesaurus

1. tail especially of a mammal posterior to and above the anus (noun.animal)

hypernym	:	tail,
definition	:	the posterior part of the body of a vertebrate especially when elongated and extending beyond the trunk or main part of the body (noun.animal)

part meronym	:	craniate, vertebrate,
definition	:	animals having a bony or cartilaginous skeleton with a segmented spinal column and a large brain enclosed in a skull or cranium (noun.animal)