| Webster's Online Dictionary |
| Expressions | Domain | Definition | |
| Bird's-eye coal | Mining | Sometimes applied to anthracite coal when very small fractures are numerous and freshly broken surfaces display rounded or oval eyelike forms, many of which have convex surfaces. See also: anthracite coal sizes; bird's-eye. (references) | |
Source: compiled by the editor from various references; see credits. | Top | ||
