particulate
Học thuậtThân thiện
Definition
Adjective:
- Composed of distinct, separate particles: Describes a substance or matter that exists in the form of tiny, separate, and often microscopic solid or liquid pieces, rather than being a continuous, uniform mass or a dissolved substance.
Noun (often used in plural: particulates):
- A minute, separate piece of solid or liquid matter: A single, very small, discrete unit of material. This term is frequently used collectively to refer to such matter suspended in a gas (like air) or a liquid, especially when it is considered a pollutant.
Usage Examples
Adjective:
- The filter is designed to remove particulate matter from the air.
- Scientists studied the particulate composition of the smoke.
Noun:
- The air quality index was high due to dangerous levels of particulates.
- Diesel engines can emit fine particulates that are harmful to health.
Advanced Usage
- "Particulate matter (PM)": A standard term in environmental science and public health referring to the mixture of solid particles and liquid droplets found in the air. It is often categorized by size, such as PM10 (particles with a diameter of 10 micrometers or less) and PM2.5 (fine particles with a diameter of 2.5 micrometers or less).
- Regulations aim to reduce the amount of particulate matter in urban environments.
Variants and Related Words
- Particulate can function as both an adjective and a noun.
- Particle (n): A minute portion of matter; a broader term that can refer to a subatomic particle (e.g., electron), a grain of sand, or a speck of dust.
- A particle of dust settled on the table.
Synonyms
- Adjective: granular, grainy, powdered, discontinuous.
- Noun: particle, speck, grain, fine.
Related Phrases
- Particulate filter: A device designed to trap and remove particulate matter from a gas or liquid stream.
- All new diesel cars are equipped with a particulate filter.
- Particulate pollution: Pollution caused by the release of particulates into the environment.
- The city is tackling particulate pollution from construction sites.
Adjective
- composed of distinct particles
Noun
- a small discrete mass of solid or liquid matter that remains individually dispersed in gas or liquid emissions (usually considered to be an atmospheric pollutant)