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pinocytosis Syllabification: pin·o·cy·to·sis
Pronunciation: /ˌpinəsīˈtōsis/ /pīnə-/

Definition of pinocytosis in English:


The ingestion of liquid into a cell by the budding of small vesicles from the cell membrane.
Example sentences
  • Cells use pinocytosis to take up TCII hydroxocobalamin.
  • However, small areas of low emission could be found in the cytoplasm, showing that the compound was taken up by the cells, probably by pinocytosis.
  • It is possible that the chemical can gain entry into cells as small, colloidal particles via phagocytosis or pinocytosis and may also enter dead, dying or damaged cells.


Example sentences
  • Abundant basal lamina, interdigitating cell membrane, rough endoplasmic reticulum, and pinocytotic vesicles were seen in all 3 cases.
  • The cells had dense basal lamina with pinocytotic vesicles along their surface and numerous cytoplasmic thin microfilaments with dense bodies.
  • Electron microscopic examination showed spindle cells containing fine filaments associated with focal densities and pinocytotic vesicles, indicating rudimentary smooth muscle cell differentiation.


Late 19th century: from Greek pino 'drink' + -cytosis on the pattern of phagocytosis.

Definition of pinocytosis in:
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