anastomosis
noun
anas·to·mo·sis ə-ˌna-stə-ˈmō-səs 
plural anastomoses ə-ˌna-stə-ˈmō-ˌsēz
1
: the union of parts or branches (as of streams, blood vessels, or leaf veins) so as to intercommunicate or interconnect
2
: a product of anastomosis : network
anastomotic
ə-ˌna-stə-ˈmä-tik
adjective 
Word History
Etymology
Late Latin, from Greek anastomōsis, from anastomoun to provide with an outlet, from ana- + stoma mouth, opening — more at stomach entry 1
First Known Use
1541, in the meaning defined at sense 1
Medical Definition
anastomosis
noun
anas·to·mo·sis ə-ˌnas-tə-ˈmō-səs ˌan-əs-
ˌan-əs- plural anastomoses -ˌsēz
1
a
: a communication between or coalescence of blood vessels
b
: the surgical union of parts and especially hollow tubular parts
anastomosis of the ureter and colon is surgically practicable
2
: a product of anastomosis
especially : a network (as of channels or branches) produced by anastomosis