or Archaean adjective Etymology: Greek archaios Date: 1872 of, relating to, or being the earliest eon of geological history or the corresponding system of rocks, Precambrian , ~ noun
ARCHEAN
Meaning of ARCHEAN in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012