Definition of madreporite in English:
madreporite
noun maˈdrɛpərʌɪtˌmadrɪˈpɔːrʌɪtˌmadrəˈpôrīt
Zoology A perforated plate by which the entry of seawater into the vascular system of an echinoderm is controlled.
Example sentencesExamples
- The madreporite was not visible until the juveniles were about 10 mm diameter and all the arms were of similar size.
- The water vascular system generally has one madreporite.
- Virtually all extraxial body wall in asteroids is of the perforate variety, since it includes body openings such as papular pores, hydropores in the madreporite, gonopores, and the anus.
- The water vascular system of the sea stars open up at the madreporite, a perforated opening in the central part of the animal.
- One of the genital plates serves as the sieve plate, or madreporite, for the water vascular system.
Origin
Early 19th century: from madrepore (see Madreporaria) + -ite1.