- in alt, in the first octave above the treble staff.
- either of two keys on a PC keyboard that is held down while pressing another key, as to perform a specific operation or type a special character.
- variant of alti- before a vowel: altazimuth.
- (esp of vocal music) high in pitch
- of or relating to the octave commencing with the G above the top line of the treble staff
- in alt in the octave directly above the treble staff
- alanine aminotransferase