Outpouching of a hollow structure in the body, that may be acquired (as in colonic diverticulitis) or be present at birth (e.g., Meckel diverticulum or Zenker diverticulum).
Source: PAC, 2016, 88, 713. (Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)) on page 745 [Terms] [Paper]