noun
phoronid; horseshoe worm
A wormlike marine animal of the phylum Phoronida. Primarily a technical term in biology.
ホウキムシは海底の砂泥中に棲管を作って生活する。
Phoronids live in tubes they construct in the sandy or muddy seafloor.
この海岸では干潮時にホウキムシの棲
At low tide, phoronid tubes can sometimes be seen on this beach.
From 箒 (ほうき, 'broom') + 虫 (むし, 'worm, insect'), referring to the broom-like tentacles. The exact origin of the name is uncertain, but it is a calque of the scientific name Phoronida (from Greek phoronis, 'broom').