1. The eon following the Hadean time and preceding the Phanerozoic eon; from about 3,800 million years ago until 544 million years ago
   - Precambrian, Precambrian eon, Precambrian aeon

Type of: aeon, eon

• bismuthal
• bismuthic
• bison
• Bison bison
• Bison bonasus
• bisontine
• bispectrum
• bisque
• Bissau
• bissextile day
• bissextile year
• bistable
• bister
• bistered
• bistort
• bistoury
• bistre
• bistred
• bistro
• bistroic
• bisulcate
• bisulfate
• bisulphate
• bit
• bit field