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A perforated platelike structure in most echinoderms that forms the intake for their water-vascular systems.
[So called because the perforations resemble those of a madrepore.]
(Biology) the opening which allows water to filter into the water vascular system of echinoderms
mad•re•por•ite(ˈmæd rəˌpɔr aɪt, -ˌpoʊr-, məˈdrɛp əˌraɪt)
a sievelike plate in certain echinoderms through which water passes into the vascular system.