or tetramethyllead (ˌtɛtrəˈmɛθɪlˌlɛd, ˌtɛtrəˌmiːθaɪlˈlɛd)
noun
chemistry former names for tetraethyl lead
tetraethyl lead in British English
or tetraethyllead (ˌtɛtrəˌiːθaɪlˈlɛd)
noun
a colourless oily insoluble liquid formerly used in petrol to prevent knocking. Its use has been banned in most developed countries due to its toxicity. Formula: Pb(C2H5)4
Systematic name: lead tetraethyl. Former names: tetramethyl lead, tetramethyllead