oleo-pneumatic
/ˌəʊlɪəʊnjuːˈmatɪk/ /ˌəʊlɪəʊnjʊˈmatɪk/Aeronautics
adjective
Designating a device or mechanism which absorbs shocks by a combination of forcing oil through an orifice and compressing air or another gas.
Origin
Early 20th century; earliest use found in Aeronautical Journal. From oleo- + pneumatic.