a metal pan containing hot coals, formerly used to warm a bed
bedwarmer in American English
(ˈbedˌwɔrmər)
noun
a long-handled, covered pan containing hot coals, used for warming beds
Also called: bedpan
Word origin
[1920–25; bed + warmer]This word is first recorded in the period 1920–25. Other words that entered Englishat around the same time include: Unknown Soldier, checkout, slalom, tie-in, zipper