Lewis & Short

conceptĭo, ōnis, f. [concipio].

  1. I. Prop.
    1. A. A comprehending; hence, concr., a circuit, compass: summa omnium naturae rerum (mundus), the system of the universe, Vitr. 9, 4, 2: tota mundi, id. 6, 1, 6.
    2. B. Aquae, a collection, reservoir, Front. Aquaed. 66; 67; 71; 73 al.
    3. C. A conception, a becoming pregnant, Cic. Div. 2, 22, 50; Plin. 22, 22, 40, § 83; and imbrium (as fructifying the earth), Vitr. 8 praef.
  2. II. Trop.
    1. A. A composing, drawing up of juridical formulas Cic. Inv. 2, 19, 58; Dig. 3, 5, 46; 12, 2, 34; 24, 3, 56; 48, 2, 3 al.
      Hence,
    2. B. Rei, an expression, Gell. 11, 13, 9.
    3. C. In late gram., a syllable, Charis. p. 1 P.