sesquicentennially

• a word derived from sesquicentennial.
  sesquicentennial

  adjective

  pertaining to or marking the completion of a period of 150 years.

More Suggestions

• quasquicentennial
• semicentennial
• semiquincentennial
• sestercentennial
• quincentennial
• sequentially
• bicentennial
• quadricentennial
• semicentenary