I. ˈkī noun
( -s )
Etymology: Greek
: the 22d letter of the Greek alphabet — symbol Χ or χ; see alphabet table
II. noun
or ch'i also qi ˈchē
( -s )
Usage: often capitalized
Etymology: Chinese (Pekingese) ch'i 4 breath, spirit
: vital energy that is held to animate the body internally and is of central importance in some Eastern systems of medical treatment (as acupuncture) and of exercise or self-defense (as tai chi)