Princeton's WordNet
lacrimal sac, tear sac, dacryocystnoun
either of the two dilated ends of the lacrimal ducts at the nasal ends of the eyes that fill with tears secreted by the lacrimal glands
Synonyms:
tear sac, dacryocyst, lacrimal sac
Wiktionary
lacrimal sacnoun
Synonyms:
nasolacrimal saclacrimal sacnoun
The upper dilated end of the tear ductSynonyms:
nasolacrimal sac
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