from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Operated by both fluid and air power
- adj. Being, or pertaining to, a type of automotive suspension system based on a nitrogen springing medium.
from the GNU version of the Collaborative International Dictionary of English
- adj. Pertaining to, or depending upon, both liquid and gaseous substances.
from The Century Dictionary and Cyclopedia
- Of or pertaining to, or produced by, the action of water and air; involving the combined action of water and air or gas.
hydro- + pneumatic (Wiktionary)