serodiagnosis

Etymology tree
Proto-Indo-European *ser-
Proto-Indo-European *sér-o-der.
Proto-Italic *serom
Latin serumder.
English serum
English sero-
Proto-Indo-European *dwóh₁
Proto-Indo-European *dwísder.
Ancient Greek διά (diá)
Ancient Greek δια- (dia-)
Proto-Indo-European *ǵneh₃-
Proto-Indo-European *-sḱéti
Proto-Indo-European *ǵn̥h₃sḱétider.
Proto-Hellenic *gignṓskō
Ancient Greek γῐγνώσκω (gĭgnṓskō)
Ancient Greek δῐαγῐγνώσκω (dĭagĭgnṓskō)
Proto-Indo-European *-tis
Ancient Greek -τις (-tis)
Ancient Greek -σῐς (-sĭs)
Ancient Greek δῐᾰ́γνωσῐς (dĭắgnōsĭs)der.
Latin diagnōsisder.
English diagnosis
English serodiagnosis
From sero- + diagnosis.