tetra-silicate

tetra-(2-ethylbutyl)silicate

[¦te·trə ¦tü ¦eth·əl¦byüd·əl ′sil·ə‚kāt] (organic chemistry) [(C2H5)C4H8O]4Si A colorless liquid with a boiling point of 238°C at 50 mmHg (6660 pascals); used as a lubricant and hydraulic fluid.