Lewis & Short

conceptācŭlum, i, n. [concipio], that which receives something, a receptacle (post-Aug. and rare).

  1. I. Prop., Plin. 2, 45, 44, § 115: sanguinis, Gell. 18, 10, 9; Front. Aquaed. 22 al.
  2. * II. Trop.: superbia aliubi conceptaculum, sed hic (sc. in superciliis) sedem habet, Plin. 11, 37, 51, § 138.