- extruding or tending to extrude
- Geol. designating or of igneous rock formed from lava that hardened on the surface of the earth, moon, etc.
See extrusive in American Heritage Dictionary 4
- Tending to push or thrust out.
- Tending to protrude or project.
- Derived from magma poured out or ejected at the earth's surface. Used of igneous rocks.
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