Lewis & Short

suffectĭo (subf-), ōnis, f. [sufficio] (post-class.).

  1. I. An adding: unguentorum, Arn. 5, 166: macularum, id. 7, 251.
  2. II. A supplying, substituting: animarum alterna mortuorum atque viventium suffectio, Tert. Anim. 28; cf. suffectura.