GNU Collaborative International Dictionary of English

Found one definition

1.       
   Particle , n. [L. particula, dim. of pars, gen partis, a part: cf. F. particule. See Part, and cf. Parcel.]
   A minute part or portion of matter; a morsel; a little bit; an atom; a jot; as, a particle of sand, of wood, of dust.
   1913 Webster
   The small size of atoms which unite
   To make the smallest particle of light.
   Blackmore.
   
   1913 Webster
   Any very small portion or part; the smallest portion; as, he has not a particle of patriotism or virtue.
   1913 Webster
   The houses had not given their commissioners authority in the least particle to recede.
   Clarendon.
   
   1913 Webster
   (R. C. Ch.) (a) A crumb or little piece of consecrated host. (b) The smaller hosts distributed in the communion of the laity.
   Bp. Fitzpatrick.
   
   1913 Webster
   (Gram.) A subordinate word that is never inflected (a preposition, conjunction, interjection); or a word that can not be used except in compositions; as, ward in backward, ly in lovely.
   1913 Webster
   (Physics) An elementary particle.
   PJC