septicentennial means 700th anniversary. Lexicurio rates it Sui generis — a strength score of 87 out of 100.
noun
- 700th anniversary.“He studied at the University of Padua, which has recently celebrated its septicentennial, and commemorative addresses on Ramazzini have been delivered in several Italian cities as part of the septicentennial ceremonies.”
- The celebration of a 700th anniversary.“As the sun neared the mountain range in the west, group after group of the septicentennial participants began leaving the head temple reluctantly but orderly, under the direction of the Soka Han.”