intrusive : Idioms & Phrases
Index
Intrusive rocks
(Geol.) , rocks which have been forced, while in a plastic or melted state, into the cavities or between the cracks or layers of other rocks. The term is sometimes used as equivalent to plutonic rocks. It is then contrasted with effusive or volcanic rocks.
Webster 1913
not intrusive
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adjective not interfering or meddling
unintrusive.