_:B0f4f10b1d6c9ada0bbbdd2b1f837df69 . _:B0f4f10b1d6c9ada0bbbdd2b1f837df69 "*sero‑" . "PIt" . "?" . _:B0f4f10b1d6c9ada0bbbdd2b1f837df69 . "Etymology for: serum (la1500)" . "*sero‑ [n.]" . "*sero‑" . .