| / English Dictionary |
DUCT
| Pronunciation (US): |  | (GB): | |
I. (noun)
Sense 1
Meaning:
An enclosed conduit for a fluid
Classified under:
Nouns denoting man-made objects
Hypernyms ("duct" is a kind of...):
conduit (a passage (a pipe or tunnel) through which water or electric wires can pass)
Hyponyms (each of the following is a kind of "duct"):
air-intake (a duct that admits air to be mixed with fuel)
air duct; air passage; airway (a duct that provides ventilation (as in mines))
Sense 2
Meaning:
A bodily passage or tube lined with epithelial cells and conveying a secretion or other substance
Example:
poison is released through a channel in the snake's fangs
Synonyms:
canal; channel; duct; epithelial duct
Classified under:
Hypernyms ("duct" is a kind of...):
passage; passageway (a path or channel or duct through or along which something may pass)
Meronyms (parts of "duct"):
ampulla (the dilated portion of a canal or duct especially of the semicircular canals of the ear)
Hyponyms (each of the following is a kind of "duct"):
lactiferous duct (ducts of the mammary gland that carry milk to the nipple)
alimentary canal; alimentary tract; digestive tract; digestive tube; gastrointestinal tract; GI tract (tubular passage of mucous membrane and muscle extending about 8.3 meters from mouth to anus; functions in digestion and elimination)
bronchiole (any of the smallest bronchial ducts; ending in alveoli)
cartilaginous tube (a duct with cartilaginous walls)
ejaculatory duct (a part of the seminal duct formed by the duct from the seminal vesicle and the vas deferens; passes through the prostate gland)
seminal duct (the efferent duct of the testis in man)
ductus deferens; vas deferens (a duct that carries spermatozoa from the epididymis to the ejaculatory duct)
epididymis (a convoluted tubule in each testis; carries sperm to vas deferens)
vagina (the lower part of the female reproductive tract; a moist canal in female mammals extending from the labia minora to the uterus)
umbilical; umbilical cord (membranous duct connecting the fetus with the placenta)
canalis cervicis uteri; cervical canal (a spindle-shaped canal extending from the uterus to the vagina)
urethra (duct through which urine is discharged in most mammals and which serves as the male genital duct)
ureter (either of a pair of thick-walled tubes that carry urine from the kidney to the urinary bladder)
aqueductus cerebri; cerebral aqueduct; Sylvian aqueduct (a canal connecting the third and fourth ventricles)
pore (any small opening in the skin or outer surface of an animal)
canalis vertebralis; spinal canal; vertebral canal (the canal in successive vertebrae through which the spinal cord passes)
ductule; ductulus (a very small duct)
canaliculus (a small canal or duct as in some bones and parts of plants)
canal of Schlemm; Schlemm's canal; sinus venosus sclerae (a circular canal in the eye that drains aqueous humor from the anterior chamber of the eye into the anterior ciliary veins)
sinus; venous sinus (a wide channel containing blood; does not have the coating of an ordinary blood vessel)
lachrymal duct; lacrimal duct; tear duct (any of several small ducts that carry tears from the lacrimal glands)
nasolacrimal duct (a duct that carries tears from the lacrimal sac to the nasal cavity)
Haversian canal (any of the many tiny canals that contain blood vessels and connective tissue and that form a network in bone)
hepatic duct (the duct that drains bile from the liver)
canalis inguinalis; inguinal canal (oblique passage through the lower abdominal wall; in males it is the passage through which the testes descend into the scrotum and it contains the spermatic cord; in females it transmits the round ligament of the uterus)
bile duct; common bile duct (a duct formed by the hepatic and cystic ducts; opens into the duodenum)
pancreatic duct (a duct connecting the pancreas with the intestine)
lymph vessel; lymphatic vessel (a vascular duct that carries lymph which is eventually added to the venous blood circulation)
salivary duct (a duct through which saliva passes from the salivary gland into the mouth)
Sense 3
Meaning:
A continuous tube formed by a row of elongated cells lacking intervening end walls
Classified under:
Hypernyms ("duct" is a kind of...):
plant part; plant structure (any part of a plant or fungus)
Hyponyms (each of the following is a kind of "duct"):
laticifer (a plant duct containing latex)
Holonyms ("duct" is a part of...):
tracheophyte; vascular plant (green plant having a vascular system: ferns, gymnosperms, angiosperms)
Context examples:
Normal duct epithelium progresses to infiltrating cancer through a series of histologically defined precursors (PanINs).
(Pancreatic Cancer Pathway, NCI Thesaurus/KEGG)
Retention cysts are gross enlargements of pancreatic ducts secondary to ductal obstruction.
(Pancreatic Cyst, NLM, Medical Subject Headings)
The lymphocytic cell population present in the mucosa of the nasopharyngeal duct of some animals.
(Nasal-Associated Lymphoid Tissue, NCI Thesaurus)
The contraction of the myoepithelial processes forces the secretory product from the secretory unit into its duct.
(Myoepithelial Cell, NCI Thesaurus)
It can occur in several anatomic sites, including parotid gland, oral cavity, paranasal sinus, skin, breast, lung, larynx, and lacrimal ducts.
(Mucoepidermoid Carcinoma, NCI Thesaurus)
Ducts that collect PANCREATIC JUICE from the PANCREAS and supply it to the DUODENUM.
(Murine Pancreatic Duct, NLM, Medical Subject Headings)
Cancer that forms in the ampulla of Vater (an enlargement of the ducts from the liver and pancreas where they join and enter the small intestine).
(ampulla of Vater cancer, NCI Dictionary)
A non-metastasizing neoplasm that arises from the extrahepatic bile ducts.
(Benign Extrahepatic Bile Duct Neoplasm, NCI Thesaurus)
The terminal dilation of an alveolar duct that gives rise to alveoli in the lung.
(Alveolar Sac, NCI Thesaurus)
This strain is susceptible to a variety of neoplasms including testicular, adrenal, pituitary, and skin and ear duct tumors in males and pituitary, uterine, mammary, and adrenal tumors in females.
(ACI/Seg, Rat Strain, NCI Thesaurus)
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