Griffithite is a hyponym of saponite.
As a noun saponite is
(mineralogy) a trioctahedral smectite mineral.
griffithite
Not English
Griffithite has no English definition. It may be misspelled.
saponite
English
Hyponyms
* bowlingite
* griffithite
* sobotkite
Synonyms
* piotine
* soapstone