| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |
| a chattering or flighty, light-headed person. |
intrusion (ĭn-tr 'zhən) Pronunciation Key
The movement of magma through cracks in underground rocks within the Earth, usually in an upward direction. ◇ Rocks that form from the underground cooling of magma are generally coarse-grained (because they cool slowly so that large crystals have time to grow) and are called intrusive rocks. Compare extrusion. |