adjective/a.bɛ.sabl/
which can be lowered
“L'extrémité des rails, située au-dessus du convoyeur, est abaissable et écartable pour permettre la pose du plateau.” — The rails' ends, located above the conveyor, can be lowered and spread out to set the tray.
Attested 1866, from abaisser (“to lower”) + -able