Coccyx
Pronunciation : Coc"cyx
Part of Speech : n.;
Etymology : [L., cuckoo, Gr. (Anat.)
Definition : Defn: The end of the vertebral column beyond the sacrum in man and tailless monkeys. It is composed of several vertebr? more or less consolidated.
pl. L. Coccyges.
Source : Webster's Unabridged Dictionary, 1913