_:Bf17f08eb8909084731377f205a180e2f . _:Bf17f08eb8909084731377f205a180e2f "*sero‑" . "PIt" . "?" . _:Bf17f08eb8909084731377f205a180e2f . "Etymology for: serum (la1500)" . "*sero‑ [n.]" . "*sero‑" . .