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单词 madreporite
释义

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.

 
 

Definition of madreporite in US English:

madreporite

nounˌmadrəˈpôrīt
Zoology
  • A perforated plate by which the entry of seawater into the vascular system of an echinoderm is controlled.

    Example sentencesExamples
    • One of the genital plates serves as the sieve plate, or madreporite, for the water vascular system.
    • 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.
    • The madreporite was not visible until the juveniles were about 10 mm diameter and all the arms were of similar size.

Origin

Early 19th century: from madrepore (see Madreporaria) + -ite.

 
 
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更新时间:2024/12/23 20:03:56