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 humanities as well love using the prefix tri-, or âthree.â A trio is a musical group that consists of âthreeâ singers. A triad can also refer to any group of âthree.â The god Poseidon wielded the powerful trident, or mighty spear that had âthreeâ prongs.