Relating to or located at both the center and the back or dorsal side of a structure, particularly in marine organisms like crinoids.
From Latin 'centrum' (center) + 'dorsum' (back), combining to describe something at the central-back position.
Crinoids are ancient sea creatures with a special plate called the centrodorsal that anchors their arms—paleontologists use it to identify these 500-million-year-old fossils!
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