ultrabasic /ul-trə-bāˈsik/ (petrology)

Extremely basic, very poor in silica

• ukelele
• ukes
• UKIP
• ukiyo-e
• Ukrainian
• ukulele
• ukuleles
• ula
• ULA
• ULCC
• ulcer
• ulcerate
• ulcerated
• ulcerates
• ulcerating
• ulceration
• ulcerations
• ulcerative
• ulcerative colitis
• ulcerative dermal necrosis
• ulcered
• ulcering
• ulcerous
• ulcerously
• ulcerousness