tercentenary

play
noun ter·cen·te·na·ry \ˌtər-(ˌ)sen-ˈte-nə-rē, (ˌ)tər-ˈsen-tə-ˌner-ē\

Definition of tercentenary

plural

tercentenaries

  1. :  a 300th anniversary or its celebration

tercentenary

adjective

First Known Use of tercentenary

1855

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