Dictionary of Ichthyology  

pyloric caecum (plural pyloric caeca) = a finger-like out-pocketing of the intestine where it meets the end of the stomach (pylorus). Also spelled cecum (ceca). Serves to aid digestion.

Pyloric caeca in Salmo; stomach at upper right, intestine at lower left, from Kingsley's "Textbook of Vertebrate Zoology, 1906. Photograph by Brian W. Coad.

Canadian Museum of Nature