from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Of, relating to, or formed of minute separate particles.
  • n. A minute separate particle, as of a granular substance or powder.
  • n. Particulate matter. Often used in the plural: diesel particulates; a high level of atmospheric particulates.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Composed of separate particles.
  • adj. Pertaining to heritable characteristics which are attributable discretely to either one or another of an offspring's parents, rather than a blend of the two.
  • n. Any solid or liquid in a subdivided state, especially one that exhibits special characteristics which are negligible in the bulk material

from the GNU version of the Collaborative International Dictionary of English

  • adj. Having the form of a particle.
  • adj. Referring to, or produced by, particles, such as dust, minute germs, etc.
  • adj. Composed of particles; finely divided.
  • n. Matter composed of particles; -- often used in the pl..
  • v. To particularize.

from The Century Dictionary and Cyclopedia

  • To make mention singly.
  • To particularize; mention.
  • Having the form of a small particle; taking the form of particles.
  • Of or pertaining to particles; produced by particles, as minute germs.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. composed of distinct particles
  • n. 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)


from The American Heritage® Dictionary of the English Language, 4th Edition

From Latin particula, a small part; see particle.

from Wiktionary, Creative Commons Attribution/Share-Alike License

From Late Latin particulatus, from Latin particula.


  • Let me show you a little bit of context here, comparing what we call particulate matter in big urban zone like Chicago, for example, 20 micrograms per cubic meter, versus Beijing, 260 micrograms per cubic meter per day.

    CNN Transcript Aug 1, 2008

  • In 2010, the Pittsburgh area—with 2.4 million people—ranked third in the country for short-term particulate pollution, according to the American Lung Association, which lobbies for clean air.

    Pittsburgh Tries to Clear the Air on Pollution

  • He said numerous scientific studies show spikes in short-term particulate levels and exposures to high day-to-day levels exposures can damage the health of people with heart and lung disease, children and older adults, and even cause premature death. - News

  • The American Lung Association ranks the metropolitan Pittsburgh area as the nation's fourth-worst in short-term particulate pollution and fifth-worst in year-round particulate pollution, with Allegheny County rated as the nation's seventh most polluted county. - News

  • His article was attempting to rebut the PG's May 4 editorial ( "Let's Clear the Air"), which properly pointed out the twisted method by which ALA ranked Pittsburgh as the No. 1 most polluted city in the United States for "short-term particulate [air] pollution." - News

  • Colloquially, the act of asphyxiating someone with a liquid or particulate is called “drowning” them, even if they don’t end up in the end result of that state, “drowned”, i. e, dead from asphyxiation from a liquid.

    Matthew Yglesias » No One Expects The Spanish Inquisition

  • These are: ground-level ozone, particle pollution also known as particulate matter, carbon monoxide, sulfur dioxide, and nitrogen dioxide.

    John B. Townsend II: The Long, Hot Summer And Code Red Days

  • As of June 2nd, parts of New York City had persistently exceeded the national ambient air quality standards for particulates (PM2. 5), ozone, and even, at least in some places, larger piece of soot known as particulate matter 10.

    Breathing in Beijing: Environmental Quality and the 2008 Summer Olympics

  • The U.S. Environmental Protection Agency (EPA) calculates the AQI for five major air pollutants regulated by the Clean Air Act: ground-level ozone, particle pollution (also known as particulate matter), carbon monoxide, sulfur dioxide, and nitrogen dioxide.

    Air quality index

  • There is no safe level for exposure to diesel particulate, which is a known carcinogen.

    November « 2008 « Stephen Rees’s blog


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