ul·tra·ba·sic 
(ŭl′trə-bāsĭk)
(ŭl′trə-bāsĭk)adj.
Containing magnesium and iron and only a very small amount of silica. Used of igneous rock.
- Francis of Sales
- (Francis) Peyton
- Francis Russell
- Francis Scott
- F(rancis) Scott (Key)
- Francis Xavier
- francium
- Franck
- Franco-
- Franco
- Franco-American
- Franco-Flemish
- francolin
- Franconia
- Franconian
- Franconia Notch
- Francophil
- Francophile
- Francophilia
- Francophobe
- Francophobia
- Francophobic
- Francophone
- Francophonic
- Franco-Provençal