Webster's Revised Unabridged Dictionary · 1913

Sagamore

Sagamore , noun

[Compare Sachem.]

1.
The head of a tribe among the American Indians; a chief; -- generally used as synonymous with sachem, but some writers distinguished between them, making the sachem a chief of the first rank, and a sagamore one of the second rank.
Be it sagamore, sachem, or powwow. — Longfellow
2.
A juice used in medicine. [Obsolete] — Johnson