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单词 placula
释义

placula

/ˈplakjʊlə/
Zoology
noun
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:2025/1/3 15:42:52