A nominal definition is the definition explaining what a word means (i.e., which says what the "nominal essence" is), and is definition in the classical sense as given above.
A definition is a statement of the meaning of a term (a word, phrase, or other set of symbols). Definitions can be classified into two large categories, intensional definitions (which try to give the sense of a term) and extensional definitions (which try to list the objects that a term describes).
Phagocytosis is a cellular process in which a cell engulfs and digests solid particles such as bacteria, dead cells, and debris. It is a specialized form of endocytosis and plays a central role in immune defense, tissue maintenance, and nutrient acquisition in many organisms.
Phagocytosis (from Ancient Greek φαγεῖν (phagein) 'to eat' and κύτος (kytos) 'cell') is the process by which a cell uses its plasma membrane to engulf a large particle (≥ 0.5 μm), giving rise to an internal compartment called the phagosome.
Phagocytosis is the process by which cells known as phagocytes ingest or engulf other cells or particles. Phagocytes may be free-living single-celled organisms, such as amoebas, or body cells, such as white blood cells.
Phagocytosis is a fundamental immune process in which specialized cells called phagocytes engulf and digest foreign particles, pathogens, and cellular debris. This mechanism allows the body to eliminate harmful microbes and clean up damaged tissues.
Phagocytosis is the process by which a cell uses its plasma membrane to envelop a large particle, one 0.5 micrometers or larger, and bring it into the cell’s interior.
In these cells, phagocytosis is a mechanism by which microorganisms can be contained, killed and processed for antigen presentation and represents a vital facet of the innate immune response to pathogens, and plays an essential role in initiating the adaptive immune response.