particulate
par-TIK-yuh-lit
/pɑːrˈtɪkjələt/
Microscopic solid or liquid particles suspended in a gas or liquid, or relating to these tiny separate particles.
Refers to physical matter suspended in air (like soot or dust), classified by size like PM2.5 or PM10.
The story behind the word. Derived from Latin 'particula', the diminutive of 'pars' (part). Scientists in the late 19th century adopted 'particulate' to classify non-gaseous suspended fragments floating in fluid or gas media.
Word relationships
- aerosol: 'Aerosol' describes the whole mixture of particles plus the surrounding air; 'particulate' refers specifically to the suspended particles themselves.
- dissolved matter: Dissolved matter exists in complete solution rather than distinct suspended particles.
Commonly confused with
- particle: 'Particle' is any tiny piece of matter; 'particulate' specifically designates microscopic airborne pollution fractions.
Word family
- particle (noun): A minute portion or piece of matter.
Collocations
- particulate matter
- fine particulate
- particulate pollution
- airborne particulate
Example sentences
- "Fine particulate matter suspended in urban air poses the greatest risk to human pulmonary function." Public Health Research
- "Workers in coal processing facilities must wear specialized respirators to filter out fine particulate dust." Industrial Hygiene
Memory hook
PARTICULATE = PARTICULARly tiny PARTICLES floating in the air. Particulate = Microscopic solid or liquid specks in air.
When not to use
Do not use to describe gaseous pollutants like carbon monoxide, which exist as individual gas molecules rather than tiny particle aggregates.
Fun facts
- PM2.5 particles are less than 2.5 micrometers wide—about 30 times smaller than the average human hair.
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