Chi (or khi): pronounced: k
, k
. The 22nd letter of the Greek alphabet. Rho (rh
). The 17th letter of the Greek alphabet, and is of Phoenician origin [chi1 + rho first two letters of Greek Khr
stos, Christ.] A combination of the Greek letters Chi and Rho (k
r
, k
A monogram and symbol for Christ, consisting of the superimposed Greek letters chi (X) and rho (P), often embroidered on altar cloths and clerical vestments. Also called Christogram.