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