• Webster's Revised Unabridged Dictionary
    • n Sparteine (Chem) A narcotic alkaloid extracted from the tops of the common broom (Cytisus scoparius, formerly Spartium scoparium), as a colorless oily liquid of aniline-like odor and very bitter taste.
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Century Dictionary and Cyclopedia
    • n sparteine A liquid alkaloid (C15H26N2) obtained from the common broom, Cytisus (Spartium) scoparius. In small doses (.02 to.05 gram) it stimulates the action of the vagus, and is used medicinally in the form of the sulphate in place of digitalis; it acts more quickly than the latter drug, but not as powerfully.
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In literature:

As heart stimulants, one may use strychnine, spartein, caffein, or camphor.
"Arteriosclerosis and Hypertension:" by Louis Marshall Warfield