A-năs/to-mō'sis, n.

n.; pl. ANASTOMOSES. [Gr. ἀναστόμωσις, from ἀναστομοῦν, to furnish with a mouth or opening, to open, from ἀνά, denoting increase or strengthening, and στομοῦν, to furnish with a mouth; στόμα, mouth; Fr. anastomose.] (Anat. & Bot.) The inosculation of vessels, or the opening of one vessel into another, as an artery into another artery, or a vein into a vein.