Definition of issuant in English:

issuant

Pronunciation /ˈiSHo͞oənt/ /ˈɪʃuənt/

adjective

Heraldry
predicative
  • (of the upper part of an animal) shown rising up or out from another bearing, especially from the bottom of a chief or from behind a fess.

    • ‘This is because the charges on the shield duplicate the crest which in many cases is a demi-creature issuant from a crown.’

Origin

Early 17th century from issue+ -ant (on the pattern of French present participles ending in -ant).