Source : Webster's Revised Unabridged Dictionary (1913)

Syntonin \Syn"to*nin\, n. [Cf. Gr. ? stretched tight, intense.]
   (Physiol. Chem.)
   A proteid substance (acid albumin) formed from the albuminous
   matter of muscle by the action of dilute acids; -- formerly
   called {musculin}. See {Acid albumin}, under {Albumin}.