(kor )

1. The center of a structure.
2. A cylindrical tissue specimen.
3. The center of a lesion as seen on radiologic imaging, i.e., a part of the lesion that appears to be irreversibly damaged.
4. The portion of a tooth that is visible above the gum line. The core of a tooth does not include its root.
5. Core muscle.

infarct c.Tissue so thoroughly deprived of blood flow (as in a stroke or myocardial infarction) that it will not survive despite reperfusion.

SEE: ischemic penumbra .

ischemic c.The infarct core plus the tissue immediately surrounding the core that may also be damaged if blood flow is not restored quickly.