interchangeable

英[ɪntə'tʃeɪn(d)ʒəbl] 美[,ɪntɚ'tʃendʒəbl]

1. of or relating to or suggestive of complementation;

"interchangeable electric outlets"

2. (mathematics, logic) such that the arguments or roles can be interchanged;

"the arguments of the symmetric relation, `is a sister of,' are interchangeable"

3. capable of replacing or changing places with something else;

"interchangeable parts"