ultrabasic /ul-trə-bāˈsik/ (petrology)

Extremely basic, very poor in silica

• febrifacient
• febrific
• febrifugal
• febrifuge
• febrifuges
• febrile
• febrilities
• febrility
• Febronianism
• February
• fec.
• fecal
• feces
• fecht
• fechter
• fecial
• fecit
• feck
• feckless
• fecklessly
• fecklessness
• fecklessnesses
• feckly
• fecks
• fecula