Lewis & Short

corpuscŭlum, i, n. dim. [corpus],

  1. I. a little body, most freq. of atoms, Lucr. 2, 152; 2, 530; 4, 199; Cic. N. D. 1, 24, 66 sq.: quantula hominum, Juv. 10, 173.
    1. B. Esp.: florum, i.e. a collection, Just. praef.
  2. II. As a term of endearment: melliculum, Plaut. Cas. 4, 4, 23.