Lewis & Short

allectĭo (adl-), ōnis, f. [allicio] (late Lat.).

  1. I. A choice or election for something, esp. a levying of troops, Capitol. M. Anton. Phil. 11; Tert. Monog. 12; Capell. 1, p. 2.
  2. II. In the lang. of civilians. a promotion to a higher office before one has performed the duties of a lower: adlectionis quaerendus est honos, Cod. Th. 6, 4, 10; so Symm. Ep. 7, 97.