pseudopod
Học thuậtThân thiện
Definition
Noun: 1. A temporary, flexible extension of the cytoplasm of a cell (especially an amoeba or some white blood cells) used for movement and feeding. This structure is not permanent; the cell can extend and retract it as needed. It functions by flowing cytoplasm into the projection, allowing the cell to move toward or engulf objects.
Usage
- The term is used primarily in biology, specifically in cell biology, microbiology, and zoology, to describe a specific mode of cellular movement and nutrition.
- It is a countable noun (e.g., , or ).
Examples
- The amoeba extended a pseudopod to surround and ingest the food particle.
- White blood cells use pseudopods to crawl through tissues and engulf bacteria.
- Under the microscope, we observed the formation of multiple pseudopodia from the single-celled organism.
Advanced Usage
- "Form a pseudopod" / "Extend a pseudopod": Describes the action of creating this temporary projection.
- The cell formed a pseudopod in the direction of the chemical signal.
- "Retract a pseudopod": Describes the action of pulling the projection back into the main cell body.
- After capturing its prey, the organism retracted its pseudopod.
Variants and Related Words
- Pseudopodium (n): The plural form is often . This is the more formal, scientific term and is frequently used interchangeably with "pseudopod."
- Pseudopodal (adj): Relating to or resembling a pseudopod.
- The pseudopodal movement was clearly visible.
- Lobopodium (n): A type of broad, blunt pseudopod.
- Filopodium (n): A type of thin, thread-like pseudopod.
Synonyms
- False foot: A direct, descriptive translation of the word's Greek roots ( = false, = foot).
- Cytoplasmic extension: A more general descriptive term.
Notes on Different Meanings
- The word pseudopod has a single, specific meaning in scientific English and is not used in other contexts or with different definitions.
Noun
- temporary outgrowth used by some microorganisms as an organ of feeding or locomotion