tetratonic

adjective3

1. •
   Made of four different musical notes.

   • The two Creek Indian "Duck Dance Songs" from the north- eastern United States illustrate the use of a tetratonic scale, A, C, D, E ( Example 5a ), and a pentatonic scale, A, C, D, E, G ( Example 5b ). — 1976
2. •
   Pertaining to or using a tetratonic scale.

   • Of course such tetratonic music is capable of powerful expression in its own particular mood but there has apparently been no attempt to evolve form as such. — 1974
3. •
   (rare) Made of four amino acids.

   • This tetratonic polymer proved to be more active than any of the tritonic polymers, showing the maximal inhibition recordable under standard test conditions. — 2009