Plural form of emissus (a thing sent out or discharged); rarely used historical or technical term.
From Latin emissus, the past participle of emittere (to send out), used as a noun to mean 'something sent forth.' The plural retains Latin form.
This is a ghost word—so rare and archaic that it barely registers in English history, likely used only by medieval Latin scholars and technical writers who needed a Latin plural for specialized discourse.
Complete word intelligence in one call. Free tier — 50 lookups/day.