cy·clo·pentadiene
plural -s
Definition of cyclopentadiene
: a colorless liquid unsaturated cyclic hydrocarbon C5H6 that is obtained by distillation of coal tar, that polymerizes to its stable dimer on standing, and is used in making plastics and insecticides
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“Cyclopentadiene.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cyclopentadiene. Accessed 14 May. 2021.
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