[Fr.; f. emboucher: see next.] a. The mouth (of a river). b. Phys. The point at which one vessel enters or leads into another.
1844. W. H. Maxwell, Sports & Adv. Scotl., x. (1855), 99. A heavy sea is tumbling into the embouchment of the Dee.
1878. M. Foster, Physiol., II. i. § 4. 248. The embouchement of the thoracic duct into the venous system is guarded by a valve.
