| Webster's Online Dictionary |
| Domain | Definition | ||
| Chemistry | Said of the texture of a porphyritic igneous rock in which crystals and glassy groundmass are equal or nearly equal in volumetric proportions, the ratio of phenocrysts to groundmass being between 5:3 and 3:5. Source: European Union. (references) | ||
| Mining | See: hyalocrystalline. (references) | ||
Source: compiled by the editor from various references; see credits. | Top | ||