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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.
Saba Learning Business -- In this track, Saba customers will share how they are succeeding (and avoiding pitfalls) with learning programs for regulatory compliance, certification, customer education, and informal learning, as well as integrating with Centra virtual classrooms and Saba Performance Management to drive business results.
Attendees will also learn about Saba's latest product advancements and services, hear numerous case studies from Saba and Centra customers, and gain and understanding of how Saba's strategic partners can assist their organization in building an aligned enterprise.