particle Definition

particle
noun

1. A tiny piece; a minute piece of matter.
2. The least bit.

Example: not a particle of sympathy
Thesaurus: bit, iota, smidgen, speck, mite, whit, jot, shred, scrap.
3. physics.
A tiny unit of matter such as a molecule, atom or electron.
4. grammar.
A word which does not have any inflected forms, eg a preposition, conjunction or interjection.
5. grammar.
An affix, such as un-, de-, -fy and -ly.
6. RC Church.
A crumb of consecrated bread, or a portion used in communion.

Etymology: 14c: from Latin particula, diminutive of pars part.