sesquicentennial

listen to the pronunciation of sesquicentennial
English - English
A 150th anniversary

The city celebrated its sesquicentennial last year.

Occurring every 150 years
Of, or relating to a sesquicentenary
{i} 150th anniversary
{s} pertaining to a period of 150 years; pertaining to the celebration of a 150th anniversary
sesquicentennials
plural of sesquicentennial