rod-shaped
Học thuậtThân thiện
Definition
- Adjective:
- Resembling a rod in form: Having a long, thin, cylindrical shape similar to a rod or stick.
- Formed like a bacillus: Having the elongated, cylindrical shape characteristic of bacillus-type bacteria.
Usage
The adjective "rod-shaped" is used to describe the physical form of an object or organism. It is primarily a scientific or technical descriptor. - It is typically placed before the noun it modifies (attributive position). - It can describe both living things (like bacteria) and non-living objects.
Examples
- Scientific Context:
- Under the microscope, we observed many rod-shaped bacteria. (This describes the form of the bacteria.)
- Certain crystals grow in rod-shaped structures. (This describes the form of the crystals.)
- General Description:
- The artist used rod-shaped pieces of clay to build the sculpture. (This describes the form of the clay pieces.)
Advanced Usage
- In Microbiology: The term is standard for classifying bacterial morphology (e.g., rod-shaped vs. spherical).
- E. coli is a gram-negative, rod-shaped bacterium.
- In Material Science: Used to describe the morphology of nanoparticles or other materials.
- The synthesis produced rod-shaped gold nanoparticles.
Variants and Related Words
- Bacilliform (adj): A more technical synonym meaning having the shape of a rod or bacillus.
- Rodlike (adj): Similar in meaning to "rod-shaped," often used in less technical contexts.
- Cylindrical (adj): Describing a three-dimensional shape with straight parallel sides and a circular cross-section; a rod-shape is a type of cylindrical shape.
Synonyms
- Bacilliform
- Rodlike
- Elongated (suggests length but not necessarily a specific cross-section)
Antonyms
- Spherical (shaped like a sphere)
- Cubical (shaped like a cube)
- Irregular (lacking a defined shape)
Notes on Meaning
- The primary meaning is strictly morphological, relating to physical shape.
- It does not imply anything about the object's function, material, or size, only its form.
- The second definition ("formed like a bacillus") is a specific application of the first within biology.
Adjective
- resembling a rod
- formed like a bacillus