·noun The end of the vertebral column beyond the sacrum in man and tailless monkeys. It is composed of several vertebrae more or less consolidated.
coccyx, ȳgis, m., = κόκκυξ, a cuckoo , Plin. 10, 9, 11, § 25 sq. ...
A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.