Lewis & Short

partĭcŭla, ae, f. dim. [pars], a small part, a little bit, a particle.

  1. I. In gen. (class.): tenuissimae particulae, Cic. de Or. 2, 39, 162: ut ne qua particula in hoc sermone praetermissa sit, id. Rep. 1, 24, 38: caeli, id. ib. 1, 39, 179: justitiae, id. Off. 2, 11, 40: particula parva, id. Pis. 35, 85: arenae, Hor. C. 1, 28, 23: undique desectam, id. ib. 1, 16, 14: minutae rerum particulae, Quint. 3, 11, 21; cf. Val. Max. 6, 9, 7: malorum, Juv. 13, 14.
  2. II. In partic.
    1. A. In rhet. lang., a clause of a sentence, Quint. 9, 4, 69; 4, 5, 25; 7, 10, 6; 8, 3, 63; 10, 3, 30.
    2. B. In gram., a particle, Gell. 2, 17, 6; 2, 19, 3; 7, 7, 6; 11, 3, 2 et saep.