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immission

noun
im·​mis·​sion | \(ˈ)i¦mishən\

Definition of immission 

1a archaic : an act of sending or letting in : injection, admission, introduction

b obsolete : something introduced

2 : commixture sense 2

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History and Etymology for immission

Latin immission-, immissio, from immissus past participle of immittere to send in (from in- in- entry 2 + mittere to send) + -ion-, -io -ion

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