Hypertext Webster Gateway: "centrum"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Centrum \Cen"trum\, n.; pl. E. {Centrums}, L. {Centra}. [L.,
center.] (Anat.)
The body, or axis, of a vertebra. See {Vertebra}.
From WordNet (r) 1.7 (wn)
centrum
n : the main body of a vertebra
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