noun Pi·sas·ter \pə̇ˈsastə(r)\

Definition of Pisaster

  1. :  a genus of large shallow-water typically 5-rayed starfishes (family Asteriidae) including the common purple or orange starfish (P. ochraceus) of the Pacific coast of North America

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Origin and Etymology of pisaster

New Latin, from Latin piscis fish + New Latin -aster (star) — more at fish

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