Meaning of adjustable-pitch

ad•just•a•ble-pitch

Pronunciation: (u-jus'tu-bul-pich'), [key]
— adj.
  1. (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. Cf. controllable-pitch.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.