noncellular
Học thuậtThân thiện
Definition
AdjectiveNot composed of or divided into biological cells. Describes entities that lack the cellular structure characteristic of living organisms.
Usage
The adjective "noncellular" is used to describe substances, structures, or entities that do not have a cellular organization. It is primarily a scientific or technical term.
Examples
- The virus is a noncellular infectious agent that requires a host cell to replicate.
- Bone matrix is a noncellular component that provides structural support.
- Scientists study the boundary between cellular and noncellular life.
Advanced Usage
- Noncellular Layer: Refers to a layer of tissue or material, such as the basement membrane in biology, that does not contain cells.
- Noncellular Immunity: A term in immunology referring to defense mechanisms that do not involve specific cells, like antibodies in bodily fluids.
Variants and Related Words
- Acellular (adj.): A synonym often used interchangeably with "noncellular," particularly in biology.
- Extracellular (adj.): Located or occurring outside a cell or cells. (Note: This describes a location relative to cells, not the absence of cells).
Synonyms
Acellular, cell-free.
Antonyms
Cellular, multicellular, unicellular.
Adjective
- not made up of or divided into cells