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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 ?
Under severe inflammatory conditions even native LDL may be taken up by pinocytosis into macrophages and induce CVD.
The contrast medium opens tight capillary connections and passes the blood-brain barrier by increasing endothelial pinocytosis.
Gonzalez-Noriega A, Grubb JH, Talkad V and WS Sly Chloroquine inhibits lysosomal enzyme pinocytosis and enhances lysosomal enzyme secretion by impairing receptor recycling.
Once the EB attaches to the columnar epithelial cell it is incorporated into the cell by a process of pinocytosis, in which the organism is surrounded with a phagosome membrane (Friss 1972).