immission
noun
im·mis·sion
(ˈ)i¦mishən
1
a
archaic : an act of sending or letting in : injection, admission, introduction
b
obsolete : something introduced
2
: commixture sense 2
Word History
Etymology
Latin immission-, immissio, from immissus past participle of immittere to send in (from in- in- entry 2 + mittere to send) + -ion-, -io -ion