Search Result for "double sharp":
Wordnet 3.0

NOUN (1)

1. a musical notation of two sharps in front of a note indicating that it is to be raised by two semitones; 



WordNet (r) 3.0 (2006):

double sharp
    n 1: a musical notation of two sharps in front of a note
         indicating that it is to be raised by two semitones