dacryocystorhinostomy

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dacryocystorhinostomy (DCR) (dak-ri-oh-sis-toh-ry-nost-ŏmi) n. an operation to relieve blockage of the nasolacrimal duct (which drains tears into the nose), in which a communication is made between the lacrimal sac and the nose by removing the intervening bone. See dacryocystitis, lacrimal (apparatus).