from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Music An interval composed of three whole tones.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An interval of three whole tones.
from the GNU version of the Collaborative International Dictionary of English
- n. A superfluous or augmented fourth.
from The Century Dictionary and Cyclopedia
- n. In music, an interval composed of three whole steps or “tones”—that is, an augmented fourth, as between the fourth and seventh tones of a scale.
Medieval Latin tritonus, from Greek tritonos, having three tones : tri-, three; see trei- in Indo-European roots + tonos, tone; see tone.(American Heritage® Dictionary of the English Language, Fourth Edition)
tri- + tone (Wiktionary)