Adlection means appointment, by nomination rather than election, to a governing body (esp. the former Roman Senate), or to a position of higher status (OED).
1949 Oxf. Classical Dict. 6/2 Though the right of adlection had been largely employed by Julius Caesar, it was exercised cautiously by the first emperors. 1974 Amer. Jrnl. Philol. 95 90 The adlection to praetorian and patrician rank could have occurred in absentia. 1977 F. Millar Emperor in Rom. World 295 Under Commodus also we meet the earliest case of adlection inter consulares. 2005 Internat. Jrnl. Classical Trad. 12 127 Adlection to the Senate would, of course, carry senatorial status.