A mineral or rock formation; possibly a specific geological specimen with a technical name from 19th-century mineralogy.
Likely from 'acid' or a Greek root + '-ite' (a common suffix in mineralogy meaning a mineral or rock type, as in 'granite'). This appears to be a very rare or obsolete mineralogical term.
The '-ite' suffix is incredibly productive in mineralogy—scientists created thousands of mineral names by adding '-ite' to descriptive roots! This word is probably so obscure that even geologists would have to look it up, showing how scientific nomenclature creates a kind of hidden language.
Complete word intelligence in one call. Free tier — 50 lookups/day.