Lewis & Short

cŏăcervātĭo, ōnis, f. [coacervo].

  1. * I. A heaping together.
    1. A. Prop.: stratae viae, Isid. Orig. 15, 16, 7.
    2. B. Trop.: actionum, Dig. 2, 1, 11.
  2. II. A rhetorical figure, * Cic. Part. Or. 35, 122; * Quint. 9, 3, 53.