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 (pĭn′ə-sĭ-tō′sĭs, -sī-, pī′nə-)
Introduction of fluids into a cell by invagination of the cell membrane, followed by formation of vesicles within the cell.

[Greek pīnein, to drink; see pō(i)- in Indo-European roots + cyt(o)- + -osis.]

pin′o·cy·tot′ic (-tŏt′ĭk) adj.


(Biology) biology a method by which a cell takes in and absorbs fluid by the process of invagination followed by tightening and closing off of the cell membrane


(ˌpɪn ə saɪˈtoʊ sɪs, ˌpaɪ nə-)

the endocytic transport of fluid into a living cell by the formation in the cell membrane of a separate tiny vacuole around each droplet.
[1931; < Greek pín(ein) to drink + -o- + -cyte + -osis, on the model of phagocytosis]
pin•o•cy•tot•ic (-saɪˈtɒt ɪk) pin`o•cyt′ic (-ˈsaɪ tɪk) adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.pinocytosis - process by which certain cells can engulf and incorporate droplets of fluid
bodily function, bodily process, body process, activity - an organic process that takes place in the body; "respiratory activity"
References in periodicals archive ?
For instance, hydrophobically modified glycol CS (HGCS) nanoparticles were evaluated on HeLa cells where most of them were internalized by the nondestructive mechanism of micropinocytosis (used for agglomerated NPs) instead of the clathrin-mediated endocytosis route.
It demonstrated that the uptake of D-luciferin was not related to caveolin, clathrin, or micropinocytosis.
A study revealed that the type II collagen in an RA mice model was taken up by DCs and macrophages predominantly via inhibition of micropinocytosis [25].