11 letters · 17 points in Scrabble
noun (mathematics) the number of elements in a set or group (considered as a property of that grouping)
originEtymology tree Latin cardō Proto-Indo-European *h₂el-der.? Proto-Italic *-ālis Latin -ālis Latin cardinālisder. Middle French cardinalbor. English cardinal Proto-Indo-European *-teh₂ Proto-Indo-European *-ts Proto-Indo-European *-teh₂ts Latin -itāsder. Old French -itebor. Middle English -ite English -ity English cardinality From cardinal + -ity.
Etymology from Wiktionary, CC BY-SA 3.0