the twenty-second letter of the Greek alphabet (Χ, χ)
See chi in American Heritage Dictionary 4
also khi(kī, kē)
noun
The 22nd letter of the Greek alphabet. See Table at alphabet.
also ch'i or Qi or qi(chē)
noun
The vital force believed in Taoism and other Chinese thought to be inherent in all things. The unimpeded circulation of chi and a balance of its negative and positive forms in the body are held to be essential to good health in traditional Chinese medicine.