quinquagenary noun & adjective. 
[kwɪn'kwadʒɪn(ǝ)ri] rare. 
LME.[formed as QUINQUAGENARIAN: see -ARY1.]A. noun.
1.  = 
QUINQUAGENARIAN noun 1. 
LME-L15.2.  A fiftieth year or anniversary. 
L16.b. adjective. = 
QUINQUAGENARIAN adjective 2. 
E18.  [TahlilGaran] English Dictionary ▲