jackscrews From WikiWord, the free dictionary English Contents DefinitionsRelated wordsReferences DefinitionsnounA jack (mechanical lifting device) which is operated by turning a leadscrew. Related wordsSynonymsscrew jackscrewssetscrewjacksscrewdriverjackknivesjackstonesmachine screwjackhammerjackstrawsset screwjack injackbootscap screwairscrewthumbscrew References Wiktionary — jackscrews Wikipedia — jackscrews