1. Denoting or characterized by invasion. 2. Denoting a procedure requiring insertion of an instrument or device into the body through the skin or a body orifice for diagnosis or treatment.
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in·va·sive -siv, -ziv adj
1) tending to spread esp tending to invade healthy tissue <\invasive cancer cells>
2) involving entry into the living body (as by incision or by insertion of an instrument) <\invasive diagnostic techniques>
in·va·sive·ness n
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in·va·sive (in-vaґsiv) 1. pertaining to or characterized by invasion. 2. involving puncture or incision of the skin or insertion of an instrument or foreign material into the body; said of diagnostic techniques.Medical dictionary. 2011.