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tetramethide
tetramethide n. 
/ˌtɛtrəˈmiːθʌɪd/,
Brit. /ˌtɛtrəˈmɛθʌɪd/
, /ˌtɛtrəˈmɛθʌɪd//ˌtɛtrəˈmiːθʌɪd/U.S. /ˌtɛtrəˈmɛˌθaɪd/
/ˌtɛtrəˈmɛˌθaɪd/ΚΠ
1899 E. F. Smith tr. V. von Richter Org. Chem. (ed. 3) I. 187 Lead tetramethide, Pb(CH3)4, boils at 110°.
tetramethide
(a) Prefixed to names of binary compounds of elements or radicals, names of salts, etc., to signify four atoms, groups, or equivalents of the element or radical in question; as tetrachloride n. at sense 2a(c)(ii); so tetrasulphide, tetriodide, tetroxide n., tetrahydroxide, tetramethide, tetracetate, tetraphosphate, etc.
ΚΠ
1880 H. E. Roscoe & C. Schorlemmer Treat. Chem. II. ii. 434 Rhodium tetrahydroxide Rh(OH)4..this compound separates out as a green powder.
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