Webster's Revised Unabridged Dictionary · 1913

Particulate

Particulate (par*tik"u*lāt) , verb, transitive and intransitive

[See Particle.]

To particularize. [Obsolete]

Particulate (par*tik"u*lat) , adjective

1.
Having the form of a particle.
2.
Referring to, or produced by, particles, such as dust, minute germs, etc. [Rare]
The smallpox is a particulate disease. — Tyndall
3.
Composed of particles; finely divided.

particulate (par*tik"u*lat) , noun

Matter composed of particles; -- often used in the pl.; as, the quantity of particulates in auto exhaust is strictly regulated.