Hypertext Webster Gateway: "ptyalin"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Ptyalin \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.
From WordNet (r) 1.7 (wn)
ptyalin
n : an amylase secreted in saliva
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