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(In a hydrozoan) the aggregate of non-reproductive zooids serving a primarily nutritive role.
Mid 19th century; earliest use found in George Allman (1812–1898), naturalist.
雅致网英汉双解词典包含236457条英汉翻译词条，涵盖了常用英语单词及词组短语的翻译及用法，是英语学习的必备工具。