Definitions for tear duct
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Princeton's WordNet
lacrimal duct, lachrymal duct, tear duct(noun)
any of several small ducts that carry tears from the lacrimal glands
Wiktionary
tear duct(Noun)
A duct that transports tears from the lacrimal sac to the nasal cavity
Citation
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"tear duct." Definitions.net. STANDS4 LLC, 2013. Web. 20 Jun 2013. <http://www.definitions.net/definition/tear duct>.

