canal of Schlemm ca·na·lofsch·lemm uncommon noun 1. a circular canal in the eye that drains aqueous humor from the anterior chamber of the eye into the anterior ciliary veins Synonymscanal of SchlemmSchlemm's canalsinus venosus sclerae Related words Broader terms duct WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.