1. (

• atom ,
• molecule ,
• particle ,
• corpuscle ,
• mote ,
• speck

) (nontechnical usage) a tiny piece of anything ;

2. (

• particle ,
• subatomic_particle

) a body having finite mass and internal structure but negligible dimensions ;

3. (

• particle

) a function word that can be used in English to form phrasal verbs ;