English archaean meaning in English  •  archaean का अर्थ अंग्रेजी में

Adjective

• Ancient; pertaining to the earliest period in geological history.

Noun

• The earliest period in geological period, extending up to the Lower Silurian. It includes an >Azoic > age, previous to the appearance of life, and an >Eozoic > age, including the earliest forms of life.