diapiresis

Passage of colloidal or other small particles of suspended matter through the unruptured walls of the blood vessel s. SEE ALSO: diapedesis. [G. diapeiro, to drive through, fr. peiro, to pierce]

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di·a·pi·re·sis (di″ə-pi-reґsis) [Gr. diapeirein to drive through] diapedesis.