Source : Webster's Revised Unabridged Dictionary (1913)

Anastomosis \A*nas`to*mo"sis\, n.; pl. {Anastomoses}. [NL., fr.
   Gr. ? opening, fr. ? to furnish with a mouth or opening, to
   open; ? + sto`ma mouth: cf. F. anastomose.] (Anat. & Bot.)
   The inosculation of vessels, or intercommunication between
   two or more vessels or nerves, as the cross communication
   between arteries or veins.

Source : WordNet®

anastomosis
     n : a natural or surgical joining of parts or branches of
         tubular structures so as to make or become continuous
         [syn: {inosculation}]
     [also: {anastomoses} (pl)]