COCCYX
coccyx, tail bone
(noun) the end of the vertebral column in humans and tailless apes
Source: WordNet® 3.1
Etymology
Noun
coccyx (plural coccyges)
(medical, formal) The final (bottom-most) fused vertebrae at the base of the spine, the tailbone.
Synonyms
• tailbone (informal)
Hypernyms
• bone
Source: Wiktionary
Coc"cyx, n.; pl. L. Coccyges. Etym: [L., cuckoo, Gr. (Anat.)
Definition: The end of the vertebral column beyond the sacrum in man and
tailless monkeys. It is composed of several vertebræ more or less
consolidated.
Source: Webster’s Unabridged Dictionary 1913 Edition