Wikipedia says about chords:
A chord, in music, is any harmonic set of three or more notes that is heard as if sounding simultaneously.
The Glossary of musical terms by naxos.com defines a chord like this:
A chord is the simultaneous sounding of two or more notes. The adjective is chordal. The study of harmony involves the correct placing of chords with relation to each other.
Assume there is a trio consisting of a piano, a guitar and a saxophone. The note c is played on the piano, the note e on the guitar, and the note g on the saxophone, simultaneously.
Could this be called a C major chord? If so, would it actually be called that way?
If not, what would it instead be called?