expectative adjective & noun. 
[ɪk'spɛktǝtɪv, ɛk-] L15.[medieval Latin expectativus, from Latin ex(s)pectat-: see EXPECTATION, -IVE.]A. adjective.
1.  Ecclesiastical. Relating to the reversion of benefices etc.; reversionary. 
L15.grace expectative, 
expectative grace Hist. a mandate given by a king or pope conferring the right of succession to a benefice.
2.  = 
EXPECTANT adjective 4. 
E17.b. noun.
1.  A thing looked forward to; a prospective benefit. 
E16-M18.2.  = 
grace expectative (see sense A.1). 
L16.  [TahlilGaran] English Dictionary ▲