s 1 e 1 s 1 q 10 u 1 i 1 c 3 e 1 n 1 t 1 e 1 n 1 n 1 i 1 a 1 l 1
16 letters · 27 points in Scrabble
Meaning
noun the 150th anniversary (or the celebration of it)
originFrom sesqui- (“one-and-a-half”) + centennial (“of 100 years”). By surface analysis, sesqui- + cent- + -ennial.
Etymology from Wiktionary, CC BY-SA 3.0