DCHP-1 Online
back-board 
n. a thin, rectangular board to which a moss bag is fastened and in which infants are carried.
See also: cradle-board moss bag tikinagan
- 1743 (1949) As soon as the child is born, they wash itt in Lu'ck warm water, put it in a Rabbit skin and tie itt in a cradle or back board. . . .
- 1863 Perhaps nothing in the camp amused the European young lady more than the infants, the "papooses," in their back-board cradles, buried up to the armpits in moss. . . .
- 1913 The Redskin boy-child . . . is not many hours old before careful hands wrap him about with gay-beaded bands that are strapped to the carven and colored back-board. . . .
- 1743 (1949) As soon as the child is born, they wash itt in Lu'ck warm water, put it in a Rabbit skin and tie itt in a cradle or back board. . . .