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Pronunciation: per'me-a'shun

Definition: The process of spreading through or penetrating, as the extension of a malignant neoplasm by proliferation of the cells continuously along the blood vessels or lymphatics.

[L. per-meo, pp. -meatus, to pass through]

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.