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.
The D major chord I is the D major chord, and contains the notes D, F#, and A. This tonic chord's root / starting note is the 1st note (or scale degree) of the D major scale. The roman numeral for number 1 is 'I' and is used to indicate this is the 1st triad chord in the scale.