1. plural of chi, the twenty-second letter of the Greek alphabet

Examples

• The professor wrote several chis on the blackboard during the Greek alphabet lesson.
• In mathematics, chis are often used as variables in statistical formulas.
• The fraternity’s name contained two chis in the original Greek spelling.
• Students struggled to distinguish between the chis and other similar Greek letters.
• The ancient manuscript showed beautifully decorated chis throughout the text.