external_gill
1. [ noun ] (anatomy,zoology) occurs in some mollusks and in tadpoles and other immature amphibians
Related terms: gill
Similar spelling:   externally
  externalize
  externality
  externalise
  external_angle
  external_ear
  external_organ
  external_drive
  externalization
  externalisation
  external_storage
  external_orifice
  external_carotid
  exothermal