hygraulic

Formed as hygr- + the second element of (hydr)aulic, as if after the Ancient Greek *ὑγραυλικός (hugraulikós).

• IPA^(key): /haɪˈɡɹɔːlɪk/, /haɪˈɡɹɒlɪk/

hygraulic (not comparable)

1. (obsolete, rare) Hydraulic.
   • 1730–6, Nathan Bailey, Dictionarium Britannicum, “Hygraulic”:

     Hygraulic,…of or pertaining to Pipes or Conveyances for Water.

   • 1756, Charles Lucas, An Essay on Waters, book I, page 2:

     The animal…is an hygraulic body.

• NED V (H–K; 1st ed., 1901), § 1 (H), page 493/2, “†Hygrau·lic, a.”
• OED (2nd ed., 1989), “†hyˈgraulic, a.”