acaryote
Học thuậtThân thiện
Definition
Noun: * A cell without a nucleus: A biological cell that lacks a distinct, membrane-bound nucleus. This is a characteristic of prokaryotic cells (like bacteria) and certain mature cells in multicellular organisms (like mammalian red blood cells).
Usage Notes
- Technical Term: "Acaryote" is a highly specialized, scientific term used primarily in cell biology and histology. It is not commonly used in everyday language.
- Alternative Common Term: The more common and widely understood term for this concept is "prokaryote" when referring to entire organisms (like bacteria). For specific cells like red blood cells, the term "enucleated cell" is often preferred.
- Context: It is used to describe the structural state of a cell, emphasizing the absence of a nucleus.
Examples
- Under the microscope, the biologist identified the bacterium as an acaryote.
- Mammalian erythrocytes are classic examples of acaryotes, having expelled their nuclei to make more room for hemoglobin.
Advanced Usage
- The term can be used in a comparative context within developmental biology or pathology.
- The study focused on the process by which the precursor cells become acaryotes.
Variants and Related Words
- Akaryote (noun): An alternative, less common spelling of "acaryote".
- Akaryotic (adjective): Describing the condition of being without a nucleus.
- The akaryotic state of the red blood cell is crucial for its function.
- Enucleated (adjective): The more frequent adjective used to describe a cell from which the nucleus has been removed or is absent.
- Prokaryote (noun): An organism consisting of a cell or cells that lack a nucleus. While related, "prokaryote" refers to a type of organism, whereas "acaryote" describes the cell itself.
Synonyms
- Enucleated cell
- Non-nucleated cell
- Prokaryotic cell (when referring to organisms like bacteria)
Antonyms
- Eukaryote (a cell or organism with a membrane-bound nucleus)
- Nucleated cell
Noun
- a cell without a nucleus (as an erythrocyte)