- 1. adj. of rock material; forced out while molten through cracks in the earth's surface Source: wordnet
- 2. Forced out at the surface; as, extrusive rocks; -- contrasted with intrusive. Source: webster
- 3. Forced out at the surface; as, extrusive rocks; -- contrastedwith intrusive. Source: adambom
- 4. a. of rock material; forced out while molten through cracks in the earth's surface Source: ecdict
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extrusive
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