Coc"cyx (?), n.; pl. L. Coccyges (#). [L., cuckoo, Gr. , cuckoo, coccyx. So called from its resemblance to the beak of a cuckoo.] Anat.
The end of the vertebral column beyond the sacrum in man and tailless monkeys. It is composed of several vertebrae more or less consolidated.
© Webster 1913.