Definition, Meaning & Synonyms

pinocytosis

Noun

/ˌpɪn.oʊˈsaɪ.təsɪs/

Definition

Pinocytosis is a cellular process in which cells ingest external liquid and dissolved substances through the engulfing of small vesicles.

Examples

The process of pinocytosis allows cells to absorb fluids and small particles.
In the context of nutrition, pinocytosis plays a role in nutrient uptake in intestinal cells.
Some immune cells use pinocytosis to sample the environment for pathogens.

Meaning

The term pinocytosis comes from the Greek words ‘pino’, meaning ‘to drink’, and ‘cytosis’, referring to a cell mechanism. It is a form of endocytosis where the cell membrane folds inward to take in fluids and nutrients from its surroundings.