Augmented triad

English Wikipedia has an article on:

Augmented triad

An augmented triad is a triad comprising a root, major third, and augmented fifth.

In just intonation

In the 5-limit:

• 16:20:25 is found on the ♭II+ (16⁄15), ♭III+ (6⁄5) ♭VI+ (8⁄5), and ♭VII+ (9⁄5) of the duodene.

In the 3-limit:

• 4096:5184:6561 may be considered a 3-limit approximation of 16:20:25.