Pty″a‐lin (?), n. [Gr. � spittle. See Ptyalism.] (Physiol. Chem.) An unorganized amylolytic ferment, on enzyme, present in human mixed saliva and in the saliva of some animals.
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Webster's Dictionary 1913
Webster's Revised Unabridged Dictionary, C. & G. Merriam Co., 1913.