Definition of sipunculid in US English:

sipunculid

noun & adjective

Zoology
  • See Sipuncula

    • ‘At least for certain sipunculids, however, circular muscles are reportedly derived from the ectomesenchyme.’
    • ‘The plesiomorphic nature of myoepithelial organization of the body wall musculature is evident in adult annelids, echiurans, and sipunculids.’

Pronunciation

sipunculid

/sīˈpəNGkyəlid/