The Collaborative International Dictionary
musculin
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.
Wiktionary
musculin
n. (context biochemistry English) syntonin