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-a1

See more synonyms for -a on Thesaurus.com
  1. a plural ending of nouns borrowed from Greek and Latin: phenomena; criteria; data; errata; genera.
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-a2

  1. a feminine singular ending of nouns borrowed from Latin and Greek, also used in Neo-Latin coinages to Latinize bases of any origin, and as a Latin substitute for the feminine ending -ē of Greek words: anabaena; cinchona; pachysandra.
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-a3

  1. an ending of personal names forming feminines from masculines: Georgia; Roberta.
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Origin of -a3

< L feminine -a (see -a2), as Claudia, feminine of Claudius

-a4

  1. a suffix designating the oxide of the chemical element denoted by the stem: alumina; ceria; thoria.
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Origin of -a4

probably generalized from the -a of magnesia
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018