|1.||[ noun ] (anatomy,zoology) a bodily passage or tube lined with epithelial cells and conveying a secretion or other substance|
|Synonyms:||channel epithelial_duct canal|
"the tear duct was obstructed" "the alimentary canal" "poison is released through a channel in the snake's fangs"
|Related terms:||passage bronchiole pore ductule pancreatic_duct canaliculus lacrimal_duct hepatic_duct common_bile_duct ejaculatory_duct cartilaginous_tube salivary_duct lymph_vessel cerebral_aqueduct urethra cervical_canal umbilical_cord vagina epididymis vas_deferens seminal_duct ureter venous_sinus spinal_canal alimentary_canal canal_of_schlemm nasolacrimal_duct haversian_canal canalis_inguinalis lactiferous_duct ampulla transmit|
|2.||[ noun ] (botany) a continuous tube formed by a row of elongated cells lacking intervening end walls|
|Related terms:||plant_part laticifer vascular_plant|
|3.||[ noun ] an enclosed conduit for a fluid|
|Related terms:||conduit conduit air_passage air-intake|