Meaning of -A in English

-A

noun suffix

( -s )

Etymology: New Latin, probably from originally nonsignificant -a in magnesia, from Medieval Latin -a (in magnesia, alchemical substance), from Greek -a, -ē (in magnēsia, magnēsiē, alchemical substance, magnet), from nominative singular feminine adjectival ending corresponding to nominative singular masculine -os and nominative singular neuter -on

: oxide

ceri a

lanthan a

thori a

Webster's New International English Dictionary.      Новый международный словарь английского языка Webster.