CENTRUM
centrum
(noun) the main body of a vertebra
Source: WordNet® 3.1
Etymology
Noun
centrum (plural centra)
A center.
(anatomy)
The central body of a vertebra; the solid piece to which the arches and some other parts are or may be attached.
The basis or fundamental portion of one of the cranial segments, regarded as analogous to vertebrae.
(seismology) The focus or place of origin of an earthquake.
Source: Wiktionary
Cen"trum, n.; pl. E. Centrums, L. Centra. Etym: [L., center.] (Anat.)
Definition: The body, or axis, of a vertebra. See Vertebra.
Source: Webster’s Unabridged Dictionary 1913 Edition