crescent wrench(n = noun.artifact) - an adjustable wrench designed to fit hexagonal nuts with the adjusting screw built into the head of the wrench;
is a kind of adjustable spanner, adjustable wrench

adjustable wrench, allen wrench, alligator wrench, almond crescent, box end wrench, box wrench, brace wrench, bulldog wrench, carriage wrench, chain wrench, crescent, crescent roll, dog wrench, fertile crescent, hook wrench, lug wrench, monkey wrench, open-end wrench, pin wrench, pipe wrench, s wrench, screw wrench, socket wrench, sparkplug wrench, stillson wrench, tap wrench, tappet wrench, torque wrench, tube wrench, wrench