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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.
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.