Etymology
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particulate (adj.)

"having the form of a small particle, taking the form of particles," 1871, from Modern Latin particulatus, from particula "little bit or part, grain, jot," diminutive of pars (genitive partis) "a part, piece, division" (from PIE root *pere- (2) "to grant, allot"). As a noun, "a particulate substance," from 1960. Related: Particulates.

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Definitions of particulate
1
particulate (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);
Synonyms: particulate matter
2
particulate (adj.)
composed of distinct particles;
From wordnet.princeton.edu