1 Retrieved October 19 2015 from http://www.acronymfinder.com/Radiology-Information-System%2fPicture-Archiving-and-Communication-System-(RIS%2fPACS).html. 2  APA style: RIS/PACS. (n.d.) Acronym Finder. ( 3 2015).
In music, a diminished triad ( Play ), also known as the minor flatted fifth (mâ­5), is a triad consisting of three minor thirds above the root â if built on C, a diminished triad would have a C, an Eâ­ and a Gâ­.
A triad is a chord constructed with 3 notes. When in root position (the root note is on the bottom) each note is a third away from the last (if intervals are new to you check out the intervals tutorial). Triads are a basic chord structure and the basis of how other types of chords are constructed. There are four types of triads: 1  Major. 2  Minor. 3  Augmented. 4  Diminished.