septuple
sextuple
sextuple
A sextuple.
In order: single, double, triple, quadruple, quintuple, sextuple, septuple, octuple, nonuple... etc. The prefixes are derived from latin number names.
HEXAD or sextuple or a sextet
After quintuple, the next term is "sextuple," which refers to something that is multiplied by six. In numerical terms, the progression is as follows: one (single), two (double), three (triple), four (quadruple), five (quintuple), and then six (sextuple). This pattern continues with septuple for seven, octuple for eight, and so on.
A 6-vessel CABG is called a sextuple bypass. I only know because a friend just had one.
Quadruple, four times. Quintuple, five times. From 1 on up the words are single double triple quadruple quintuple sextuple septuple octuple ... and so on
The progression is: single, double, triple, quadruple, quintuple, sextuple, septuple, octuple.
http://en.wikipedia.org/wiki/Tuple Wikipedia lists 1-12 and then 100.
Some words that start with the prefix "sext" include sextant (a navigation instrument), sextet (a group of six people or things), and sextuple (to multiply by six).
That is C-sharp Major, but since the circle of 5ths is a circle, it could go on for infinite, you COULD have C sextuple-sharp major with 42 sharps but it is never necessary to go this far!