Pronunciation: (pur-tik'yu-lit, -lāt", pu-tik'-, pär-),[key] —adj. of, pertaining to, or composed of distinct particles.
—n. 1. a separate and distinct particle.
2. a material composed of such particles.
3. particulates, a. the aggregate of such particles, esp. as produced by one source: tests to analyze diesel particulates. b. Meteorol.solid or liquid particles suspended in the atmosphere, esp. pollutants.