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Invasion |
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invasion
1. Pathol the spread of cancer from its point of origin into surrounding tissues 2. Ecology the movement of plants to a new area or to an area to which they are not native invasion [in′vā·zhən] (geology) The movement of one material into a porous reservoir area that has been occupied by another material. (medicine) The phase of an infectious disease during which the pathogen multiplies and is distributed; precedes signs and symptoms. The process by which microorganisms enter the body. Invasion (infestation), the infection of man, animals, and plants by animal parasites. Invasion may be active, as when a parasite attacks or penetrates the body of the host through injured or intact skin, or passive, brought into the body with water or food. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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