mega-annum

English

Etymology

From mega- +‎ annum.

Pronunciation

  • IPA(key): /ˌmɛɡəˈænəm/

Noun

mega-annum (plural mega-annums or mega-anna)

  2. Synonym of megayear: a period of 1 million years.
    Alternative forms: megannum, megaannum, Ma (symbol)
    Holonyms: giga-annum, gigaannum, gigannum, gigayear < eon, eternity
    Meronyms: kiloannum, kiloyear
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