hemichordate /ˌhɛmɪˈkɔːˌdeɪt/

→ see also acorn worm

• 1. 

  N any small wormlike marine animal of the subphylum Hemichordata (or Hemichorda), having numerous gill slits in the pharynx: phylum Chordata (chordates) 半索动物

• 2. 

  ADJ of, relating to, or belonging to the subphylum Hemichordata 半索类的; 与半索类有关的; 属于半索类的