What is the meaning of Pentremites?

(n.) A genus of crinoids belonging to the Blastoidea. They have five petal-like ambulacra.
Webster's Revised Unabridged Dictionary
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APAWebster's. (2011). pentremites. Retrieved September 20, 2026, from http://smartdefine.org/pentremites/definitions/2043516
ChicagoWebster's. 2011. "pentremites" http://smartdefine.org/pentremites/definitions/2043516 (accessed September 20, 2026).
HarvardWebster's 2011, pentremites, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/pentremites/definitions/2043516>.
MLAWebster's. "pentremites" 27 May 2011. Web. 20 September 2026. <http://smartdefine.org/pentremites/definitions/2043516>