Dictionary of Mining, Mineral, and Related Terms
Recommended Usage

Perform a search (top left) for a string of up to 10 characters for matches on the beginning of a term, then click on a match (lower left) to display its definition (lower center).
Click on any support term ("see", "see also", "CF", "syn") shown red in a definition to display the support term definition (lower right).
Searches may be performed on either terms or support terms by selecting the appropriate search setting (top left) prior to clicking the search button. The default functionality is a terms search.
A terms search is generally faster than a support search.
Try a support search if the term you are searching for does not appear in a terms search.