- an enzyme in the saliva that converts starch into dextrin and maltose.
- biochem an amylase secreted in the saliva of man and other animals
- An amylase present in saliva that catalyzes the hydrolysis of starch into maltose and dextrin.
- An enzyme found in the saliva of humans and herbivorous animals that helps in the predigestion of starches. Ptyalin is a type of amylase.