In digestion, a bolus (from Latin bolus, "ball") is a ball-like mixture of food and saliva that forms in the mouth during the process of chewing (which is largely an adaptation for plant-eating mammals). It has the same color as the food being eaten, and the saliva gives it an alkaline pH.
- "Digestion in the Mouth, Pharynx and Esophagus". Boundless. Retrieved June 4, 2016.
- "Bolus – Definition and More from the Free Merriam-Webster Dictionary". Merriam-webster.com. Retrieved June 4, 2016.