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.
- cryptococcal
- cryptococcosis
- cryptococcus
- cryptocrystalline
- cryptogam
- cryptogamic
- cryptogamous
- cryptogenic
- cryptogenous
- cryptogram
- cryptogrammic
- cryptograph
- cryptographer
- cryptographic
- cryptographically
- cryptography
- crypto-Jew
- cryptologic
- cryptological
- cryptologist
- cryptology
- cryptomeria
- cryptonym
- cryptorchid
- cryptorchidism