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tungsten steel an alloy of steel and tungsten, having great hardness and high resistance to heat.
tung tree any of several Asian trees whose seeds yield tung oil.
tunic a loose-fitting, knee-length outer garment, often without sleeves and sometimes belted, worn esp. by the ancient Greeks and Romans. [4 definitions]
tunicate any of several marine chordates, such as sea squirts, having a saclike body enclosed in a thick membrane or tunic. [3 definitions]
tuning fork a small two-pronged metal device that when struck produces a tone in perfect pitch, used to tune musical instruments, test hearing, and the like.
Tunis the seaport capital of Tunisia. [2 definitions]
Tunisia a North African country on the Mediterranean Sea east of Algeria.
tunnage tonnage.
tunnel an underground or underwater passageway, as for a railroad through a mountain or for a road under a river or city. [6 definitions]
tunnel disease see aeroembolism. [2 definitions]
tunnel vision an abnormal condition in which one loses peripheral vision. [2 definitions]
tupelo any of several sour gum trees of swampy areas in the southern United States. [2 definitions]
Tupi a member of any of several Indian peoples resident in various river valleys of Brazil, esp. the Amazon. [2 definitions]
tuppence see twopence.
tuque in Canada, a knitted winter cap resembling a stocking cap of double thickness.
turban a head covering worn esp. by Muslim men, consisting of a long piece of cloth wrapped several times around the head. [3 definitions]
turbellarian belonging to a class of mostly aquatic flatworms that have cilia on the surface of the body. [2 definitions]
turbid clouded or murky because of stirred-up particles or sediment; muddy. [3 definitions]
turbidimeter an instrument that measures the turbidity of a fluid by the degree of scattering of a light beam passed through it.
turbine an engine driven by a moving fluid, such as water, steam, or air, that pushes against the blades or paddles attached to a central shaft.
turbo see turbocharger.