cefalonium

Etymology tree Translingual Cephalosporium Proto-Indo-European *-nós Proto-Indo-European *-iHnos Proto-Italic *-īnos Latin -īnusder. Old French -inbor. Middle English -in English -ineclip. English -in English cephalosporin Proto-Indo-European *-ikos Proto-Italic *-ikos Latin -icuslbor. Old French -iquebor. Middle English -ik English -ic English cephalosporanic New Latin ammōniumbor. English ammonium English onium English -onium English cefalonium From cephalo(sporanic acid) + -onium (“quaternary ammonium compound”).

来源：wiktionary