ultrabasic /ul-trə-bāˈsik/ (petrology)

Extremely basic, very poor in silica

• autograph book
• autographed
• autographic
• autographically
• autographies
• autographing
• autographs
• autography
• autogravure
• autogravures
• autoguide
• autogyro
• autogyros
• autoharp
• autoharps
• autohypnoses
• autohypnosis
• autohypnotic
• auto-immune
• auto-immune diseases
• auto-immunisation
• auto-immunisations
• auto-immunities
• auto-immunity
• auto-immunization