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Pen·tre·mi·tes | \ ˌpen‧trəˈmīˌtēz \
Definition of Pentremites
: a genus (the type of the family Pentremitidae) comprising Mississippian blastoid echinoderms having an ovate or pyriform calyx with five ambulacral areas suggestive of petals
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Merriam-Webster unabridgedWords at Play
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