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immune body an antibody.
immune system the bodily system of organs, tissues, cells, and cell products, which protects the body by detecting the presence of, and disabling, disease-causing agents in the body.
immunity the state or condition of being immune to a disease. [2 definitions]
immunize to cause to be immune, as by vaccination.
immunogenic producing immunity.
immunology the branch of medicine concerned with antibody production and resistance to disease.
immunosuppressive of drugs, tending to suppress the natural immune response.
immure to confine within or as though within walls; shut in. [2 definitions]
immutable not subject to change; unchanging or unchangeable.
imp a little demon or evil spirit. [2 definitions]
imp. abbreviation of "import," "imported," or "importer." [2 definitions]
impact a forceful coming together of two objects or bodies. [4 definitions]
impacted forced closely into. [2 definitions]
impair to weaken, damage, or cause to diminish in value or quality.
impala a reddish brown African antelope known for its ability to leap and for the long, ridged, curved horns of the male.
impale to pierce and hold fast with a sharp-pointed instrument such as a spear. [2 definitions]
impalpable not subject to perception by touch; intangible. [2 definitions]
impanel to enroll on a list or panel for jury duty, or to select (a juror or a jury) from such a list.
impart to give all or a part of; bestow or transmit. [2 definitions]
impartial not partial or prejudiced; even-handed or objective.
impassable impossible to go past, through, over, or around.