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单词 placula
释义

Definition of placula in English:

placula

noun ˈplakjʊlə
Zoology
  • A disc-shaped embryo, occurring as a developmental stage in urochordates and some sponges; a hypothetical primitive metazoan resembling this.

Origin

Late 19th century. From German Plakula from ancient Greek πλάκ-, πλάξ tablet, plate + German -ula.

Definition of placula in US English:

placula

nounˈplakjʊlə
Zoology
  • A disc-shaped embryo, occurring as a developmental stage in urochordates and some sponges; a hypothetical primitive metazoan resembling this.

Origin

Late 19th century. From German Plakula from ancient Greek πλάκ-, πλάξ tablet, plate + German -ula.

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更新时间:2025/6/19 8:57:56