The plural of a letter A would be "As" (where this was not likely to be read as 'as'), or A's (a rare proper case of using apostrophes to form plurals).
In algebra, double the value of the variable "a" is 2a.
You get 24 if you double 12.
B sharp, C double-sharp, D double-sharp, E sharp, F double-sharp, G double-sharp, A double-sharp, B sharp.
wavelength
Multiply x2, then do it again.
146
Double Trouble, Double Jeopardy, Double Dutch, Double Dare
Word that has double c double s and double l: successfully.
Successfully contains double L double C and double S. Unsuccessfully also contains double L double C and double S.
An In-N-Out Double Double has 670 calories.
double helix
A double double is a term commonly used in Canada when buying coffee a Tim Hortons. A double double is two teaspoons of sugar and two cream.
Double reed.
On the double comes from the term "double time". When marching if you double time you are running. So on the double basically means hurry up.
example: double num = 12.34; double *numptr = # double **numptrptr = &numptr;
Double of 58 is 116.
double u double u double u
Double the amounts in the recipe. Make a double batch.