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A plural of centrum.


(ˈsɛn trəm)

n., pl. -trums, -tra (-trə).
1. a center.
2. the body of a vertebra, the part cushioned by the spinal disk.
[1850–55; < Latin; see center]
References in classic literature ?
Nevertheless, in two places in this very centra region, I found small heaps of stones, which I do not thin could have been accidentally thrown together.
E[acute accent]--Best practices, tips and techniques for increasing the ROI of Saba and Centra solutions
Centra Technical -- This track will provide in-depth information on migration, architecture, integration, and implementation sessions, as well as technical insight on Saba Enterprise 5 and Centra 7.