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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 ?
The concentration of Igs in colostrum will be elevated due to the pinocytosis process, and then Igs will be moved from the blood to the colostrum Guedes et al.
It is also a hypothesis that selenium acts directly on the intestinal epithelium and improves pinocytosis (Kamada et al.
An explanation of the failure of the direct antiglobulin test to detect erythrocyte sensitization in ABO haemolytic disease of the newborn and observations on pinocytosis of IgG anti-a antibodies in infant (cord) red cells.
In pirarucu, the latter function is most likely performed in the S3 region, where absorption vacuoles were often observed in the apical cytoplasm of enterocytes, which can be indicative of protein absorption by pinocytosis (Ezeasor & Stokoe, 1981; Carrasson et al.
Diagnosis of neurobrucellosis depends on clinical manifestations, CSF findings suggestive of pinocytosis, high protein levels, low or standard glucose levels, and a positive antibody titer for Brucella spp.
Even secretory antigens cannot be efficiently presented to MHC class 1 and II because of the inefficiency of internalization of soluble antigens through fluid phase pinocytosis (20).
Exogenous antigens are traditionally processed by endocytosis or pinocytosis and presented via HLA class II to CD4 T-cells [10], although they can also be presented in the context of HLA class I by cross-presentation to CD8 T-cells [11].
Mainly existing on the cell membrane, EGFR binds EGF and enters the cytoplasm through invagination and pinocytosis to transmit biological signals.