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diverticulum Definition

di·ver·ticu·lum (dī′vər tikyo̵̅o̅ ləm)

noun pl. diverticula -·la (-lə)

Anat. a normal or abnormal pouch or sac opening out from a tubular organ or main cavity

Etymology: L diverticulum, var. of deverticulum, a bypath < devertere, to turn aside: see de- & verse