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zinc a chemical element that has thirty protons in each nucleus and that occurs in pure form as a bluish white corrosion-resistant metal that is brittle at room temperature but becomes malleable when heated, used in a variety of alloys and in electrical devices. (symbol: Zn) [2 definitions]
zinc ointment a salve that contains zinc oxide and is used to treat skin conditions.
zinc oxide a whitish powder used as a pigment, in the manufacture of rubber articles and plastics, and in pharmaceuticals and cosmetics.
zinc sulfate a colorless crystalline compound used medicinally as an astringent or emetic, and as a preservative for wood and skins, a bleach for paper, a fungicide, and the like.
zinc white zinc oxide, esp. when used as a white pigment.
zinfandel (sometimes cap.) a dry red wine made primarily in California. [2 definitions]
zing energetic qualities; liveliness; vitality. [3 definitions]
zinger (informal) a quick witty retort or remark, esp. one causing embarrassment. [2 definitions]
zinnia any of various plants related to the daisy, native to North and South America, and noted for showy, long-lasting, colorful flowers.
Zion the hill in Jerusalem on which the Temple was built. [3 definitions]
Zionism an international Jewish movement formerly for reestablishing in Palestine a Jewish national homeland, and now for supporting and developing it.
zip1 a sudden, sharp whizzing noise, such as that of an arrow or bullet in flight. [4 definitions]
zip2 to fasten or unfasten by closing or opening a zipper. [2 definitions]
Zip Code trademark for a system using a code of five or more digits to designate every postal delivery area in the United States.
zip drive (trademark) a computer part that saves information on a special disk, called a "zip disk."
zip gun a crude handmade pistol, usu. consisting of a piece of pipe attached to a wooden stock, that fires a .22-caliber bullet.
Ziploc trademark for a type of clear plastic storage bag that is sealed by pressing together special strips along the top edges.
ziplock of or denoting a plastic storage bag sealed by pressing together the top edges, such as those with the trademark Ziploc.
zipper a fastener consisting of two rows of interlocking teeth and a slide pull that either joins or parts them, used esp. on clothing such as jackets or pants. [2 definitions]
zippy (informal) full of life; energetic.
zircon a common mineral occurring generally in brown or gray crystals, or sometimes in transparent ones, which are often cut and polished into bluish white gems. The main ore of the metal zirconium.