| Main Entry: | mechanical weathering |
| Part of Speech: | n |
| Definition: | the erosion or breakdown of rock into smaller fragments by natural physical agents with no chemicals involved; also called disintegration |
| Example: | Agents of mechanical weathering are frost, tree roots, etc. |
| an extraordinary or unusual thing, person, or event; an exceptional example or instance. |
| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |