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Definition of Dacryocyst

Dacryocyst: The lacrimal sac; tear sac. The dilated (widened) upper end of the nasolacrimal duct, the passageway that allows tears to drain into the nasal cavity.

Source: MedTerms™ Medical Dictionary
http://www.medicinenet.com/script/main/art.asp?articlekey=25273
Last Editorial Review: 3/19/2012

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