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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.