半はん索さく動どう物ぶつ門もん

noun

Hemichordata; hemichordates

A phylum of marine deuterostome animals, including acorn worms and graptolites. Used in biological and taxonomic contexts.

• 半はん索さく動どう物ぶつ門もんにはギボシムシ類るいが含ふくまれる。

  The phylum Hemichordata includes acorn worms.