tear sac

Từ điển WordNet v3.1 - WordNet Dictionary

noun

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
• Syn:
lacrimal sac, dacryocyst
• Hypernyms:
vesicle, cyst
• Part Holonyms:
lacrimal apparatus