The semi-digested food that is formed within the buccal cavity due to the action of teeth and saliva is called a bolus.
This bolus has food completely masticated and ground into fine particles and saliva makes it lubricated for smooth movement through the alimentary canal.
When we chew the food carbohydrate in the form of starch is converted to maltose by the action of an enzyme salivary amylase. Hence the food is semi-digested.
Final answer: Semi-digested food in the buccal cavity is called a bolus.