Webster’s Revised Unabridged Dictionary · 1913
Seawan
Sea′wan, Sea′want, n. The name used by the Algonquin Indians for the shell beads which passed among the Indians as money.
☞ Seawan was of two kinds; wampum, white, and suckanhock, black or purple, — the former having half the value of the latter. Many writers, however, use the terms seawan and wampum indiscriminately. Bartlett.