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.
This is the seventh chord of the 7th degree of the major scale (aka â âleading note chordâ). One simple approach to the formation of the half-diminished seventh chord is by adding a minor seventh interval to a diminished triad. However, to do this, you must be familiar with diminished triads in all keys..