semicentennial
[ sem-ee-sen-ten-ee-uh l, sem-ahy- ]
/ ˌsɛm i sɛnˈtɛn i əl, ˌsɛm aɪ- /
adjective
of or relating to a fiftieth anniversary.
noun
a fiftieth anniversary.
the celebration of this anniversary.
Origin of semicentennial
First recorded in 1855–60;
semi- +
centennial
Words nearby semicentennial
semibituminous coal,
semibold,
semibreve,
semicanal,
semicentenary,
semicentennial,
semicircle,
semicircular canal,
semicircular duct,
semicivilized,
semiclassical
British Dictionary definitions for semicentennial
semicentennial
/ (ˌsɛmɪsɛnˈtɛnɪəl) /
adjective
(prenominal)
of or relating to the 50th anniversary of some event
occurring once every 50 years
noun
a 50th anniversary