sacculation

noun
sac·​cu·​la·​tion | \ ˌsak-yə-ˈlā-shən How to pronounce sacculation (audio) \

Medical Definition of sacculation

1 : the quality or state of being sacculated
2 : the process of developing or segmenting into sacculated structures
3 : a sac or sacculated structure especially : one of a linear series of such structures the sacculations of the colon