micropinocytosis

noun
mi·cro·pi·no·cy·to·sis | \ˌmī-krō-ˌpī-nō-ˌsī-ˈtō-səs \
plural micropinocytoses\-ˈtō-ˌsēz \

Medical Definition of micropinocytosis 

: the incorporation of macromolecules or other chemical substances into cells by membrane invagination and the pinching off of relatively minute vesicles

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