| Webster's Online Dictionary |
| Expressions | Domain | Definition | |
| Hard-rock phosphate | Mining | A term used in Florida for pebbles and boulders of a hard massive homogeneous light-gray phosphorite, showing irregular cavities that are usually lined with secondary mammillary incrustations of calcium phosphate. It is essentially equivalent to the term "white-bedded phosphate" that is used in Tennessee. (references) | |
Source: compiled by the editor from various references; see credits. | Top | ||
