a framework of springs placed in a bedstead to support the mattress
2.
any of these springs
bedspring in American English
(ˈbedˌsprɪŋ)
noun
a set of springs for the support of a mattress
Word origin
[1910–15; bed + spring]This word is first recorded in the period 1910–15. Other words that entered Englishat around the same time include: carbon cycle, coverage, homeroom, radio, zing