micropinocytosisn.
/ˌmʌɪkrə(ʊ)ˌpʌɪnəʊsʌɪˈtəʊsɪs/, /ˌmʌɪkrə(ʊ)ˌpɪnəʊsʌɪˈtəʊsɪs/, U.S. /ˈˌmaɪkroʊˌpaɪnoʊˌsaɪˈtoʊsəs/ Biology.
Pinocytosis involving the formation of very small vesicles (visible only with the electron microscope).
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the world > life > biology > biological processes > cellular processes > [noun] > absorption
pinocytosis1895
athrocytosis1938
micropinocytosis1956
rhopheocytosis1961
1956 Jrnl. Biophysical & Biochem. Cytol. 2 Suppl. 107 The particles, possibly coated with protein, become attached to the plasma membrane. Minute invaginations of the membrane, with the adherent granules, develop. The invaginated membrane is pinched off, resulting in the formation of an intracellular vacuole. Possibly a type of micropinocytosis takes place.
1973 Nature 2 Mar. 57/1 Electron microscopic studies..suggest that some synaptic vesicles form by a process of micropinocytosis at the presynaptic terminal membrane.
1984 L. W. Browder Developmental Biol. (ed. 2) vii. 269 The yolk precursor (vitellogenin) is synthesized in the liver and transported via the circulation to the ovary, where it is taken up into the oocytes by micropinocytosis.
1986 Proc. National Acad. Sci. U.S.A. 83 4334 The punctuate appearance of the probe might be accounted for by receptor-mediated micropinocytosis of the ligand.
This entry has been updated (OED Third Edition, December 2001; most recently modified version published online March 2022).
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n.1956