SEMICENTENNIAL
Source: 567
Sem′i‐cen‐ten″ni‐al (?), a. Of or pertaining to half of a century, or a period of fifty years; as, a semicentennial commemoration.
Source: 567
Sem′i‐cen‐ten″ni‐al (?), a. Of or pertaining to half of a century, or a period of fifty years; as, a semicentennial commemoration.