| lead radioisotope | <radiobiology> Unstable isotopes of lead that decay or disintegrate emitting radiation. Lead atoms with atomic weights 194-203, 205, and 209-214 are radioactive lead isotopes. (25 Jun 1999) |
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| lead stomatitis | Oral manifestation of lead poisoning consisting of a bluish-black line following the contours of the marginal gingiva where lead sulfide has precipitated due to the inflamed environment. (05 Mar 2000) |
| lead storage battery | <chemistry> A battery (used in cars) in which the anode is lead, the cathode is lead coated with lead dioxide, and the electrolyte is a sulfuric acid solution. (09 Jan 1998) |
| lead sulfide | The native form in which lead is chiefly found. Synonym: galena. (05 Mar 2000) |
| lead tetraethyl | Pb(C2H5)4; tetraethylplumbane;an anti-knock compound added to motor fuel; has a toxic action causing anorexia, nausea, vomiting, diarrhoea, tremors, muscular weakness, insomnia, irritability, nervousness, and anxiety; death may occur. Synonym: lead tetraethyl. (05 Mar 2000) Previous: tetraethylammonium, tetraethylammonium chloride, tetraethylammonium ionNext: tetraethyl lead, tetraethylmonothionopyrophosphatelead tetraethyl -->tetraethyl lead <chemical> Tetraethylplumbane. A highly toxic compound used as a gasoline additive. It causes acute toxic psychosis or chronic poisoning if inhaled or absorbed through the skin. Chemical name: Plumbane, tetraethyl- (12 Dec 1998) |
| lead tetroxide | A bright orange-red powder that turns black when heated; used in ointments and plasters. Synonym: red lead, red oxide of lead. (05 Mar 2000) |
| limb lead | One of the three standard leads (leads I, II, III) or one of the unipolar limb lead's (aVR, aVL, aVF). (05 Mar 2000) |