diverˈticular,a. [f. L. dīverticul-um: see below and -ar1.] Pertaining to or of the nature of a diverticulum. 1849–52Todd Cycl.Anat. IV. 847/1 A left gall-bladder..is [a] diverticular production of the gall-duct.1878Bell Gegenbaur's Comp.Anat. 49 A diverticular outgrowth.