oleo · noun1
Ellipsis of oleo strut.
oleo · noun2
From oleum (“olive oil”).
oleo · noun3
Clipping of oleomargarine.
Etymology from Wiktionary, CC BY-SA 4.0.
oleo
Today it means: A type of energy-absorbing landing gear strut in which sudden compression or extension of the strut causes a gas-filled chamber to push or pull a piston which forces oil through a small orifice, resulting in absorption of energy through viscous effects. Full definition →