3 definitions
for centra
From The Collaborative International Dictionary of English v.0.48 :
Centrum \Cen"trum\, n.; pl. E. Centrums, L. Centra. [L.,
center.] (Anat.)
The body, or axis, of a vertebra. See Vertebra.
[1913 Webster]
From WordNet (r) 2.0 :
centra
See centrum
From WordNet (r) 2.0 :
centrum
n : the main body of a vertebra
[also: centra (pl)]