Of or relating to emission or an outlet; serving to send out or discharge.
From Latin emissus (sent out) plus -ory (meaning relating to or serving for), similar to words like 'sensory' and 'respiratory.'
This adjective form exists but rarely sees use—we say 'emissary' when we mean a person sent out, and 'emissive' when describing something's ability to emit, leaving emissory stranded between two better-loved cousins.
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