mantissa /man-tisˈə/

1. The fractional part of a logarithm (mathematics)
2. The significant digits of a floating-point number (computing)

• attunes
• attuning
• at twice
• Atty
• Atty-Gen.
• at unawares
• a turn for the better
• a turn for the worse
• ATV
• at variance
• atwain
• atweel
• atween
• at will
• atwitter
• atwixt
• at worst
• at. wt.
• at your service
• atypical
• atypically
• AU
• Au
• aubade
• aubades