Source : Webster's Revised Unabridged Dictionary (1913)

Autostability \Au`to*sta*bil"i*ty\, n. [Auto- + stability.]
   (Mechanics)
   Automatic stability; also, inherent stability. An
   a["e]roplane is inherently stable if it keeps in steady poise
   by virtue of its shape and proportions alone; it is
   automatically stable if it keeps in steady poise by means of
   self-operative mechanism.