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jacaranda any of several tropical American trees of the bignonia family, with compound leaves and clusters of pale purple flowers. [2 definitions]
jacinth a reddish orange zircon or similar mineral, used as a gemstone. [2 definitions]
jack any of a number of devices used to lift all or a part of a heavy object a short distance, as by leverage or hydraulic pressure. [8 definitions]
jack- male; man. [2 definitions]
jackal any of a number of wild Asian and African dogs, closely related to the wolf, that are esp. known for scavenging and for attacking small or weakened prey. [2 definitions]
jackanapes an arrogant, insolent young man.
jackass a male donkey or ass. [2 definitions]
jackboot a sturdy leather boot extending above the knee, used by the military, police, and the like. [2 definitions]
jackbooted marked by bullying brutality, as police or military tactics against civilians.
jackdaw a shiny black bird originating in Europe and related to the crow.
jacket a short coat that extends to the waist or hip, used as an outer garment or as part of a suit. [3 definitions]
jacketless combined form of jacket.
Jack Frost the personification of frost or cold weather.
jackhammer a hand-held device powered by compressed air, used to drill rock, cement, or the like; pneumatic drill.
Jackie Robinson born Jack Roosevelt Robinson, U.S. professional baseball player who in 1947 became the first African American to play in Major League Baseball(b.1919--d.1972).
jack-in-the-box a toy consisting of a box from which a puppet springs up when the lid is opened.
jack-in-the-pulpit a North American wildflower having a single vertical spike with a green and purple sheath that forms a hood over its top.
Jack Jefferies U.S. three-time world champion formation skydiver (b.1966).
jackknife a large pocketknife whose blade can be folded into the handle. [2 definitions]
jacklight a light used as a lure in hunting or fishing at night. [2 definitions]
jack mackerel a mackerellike food fish of the jack family that is found in Pacific coastal waters.