The 11th Greek letter is known as "Kappa" and is commonly represented as "Κ" or "κ". It comes after "Iota" and before "Lambda" in the Greek Alphabet. Kappa is also used to denote statistical significance in mathematics and science, and in Kappa Alpha Psi Fraternity, Inc. and Kappa Kappa Gamma sorority. In crossword puzzles, it is a common clue for a four-letter answer that starts with "K" such as "Kind" or "Kale".
