hyperammonemia

noun
hy·​per·​am·​mo·​ne·​mia | \ˌhī-pə-ˌram-ə-ˈnē-mē-ə \
variants: also hyperammoniemia \ ˌhī-​pə-​rə-​ˌmō-​nē-​ˈyē-​mē-​ə \ or chiefly British hyperammonaemia also hyperammoniaemia

Medical Definition of hyperammonemia 

: the presence of an excess of ammonia in the blood

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