adjustable-pitch

[ uh-juhs-tuh-buh l-pich ]
/ əˈdʒʌs tə bəlˈpɪtʃ /

adjective

(of a marine or aircraft propeller) having blades whose pitch can be changed while the propeller is stationary, chiefly to suit various conditions of navigation or flight.

Origin of adjustable-pitch

First recorded in 1905–10