Small vesicle-like structures formed from the fragments of the endoplasmic reticulum when cells are broken up or homogenized.

particle; microparticle; corpuscle

Particulate matter or tiny particles suspended in the air or water; specifically refers to air pollutants such as dust or exhaust that are small enough to be inhaled into the lungs. In mainland China, this is often called [[可吸入颗粒物|可吸入顆粒物|ke3 xi1 ru4 ke1 li4 wu4]].

fine airborne particles with a diameter of 2.5 micrometers or less, also known as PM2.5