isoprene (plural isoprenes)
(organic compound) An unsaturated hydrocarbon, C5H8, that is readily polymerized; natural rubber (caoutchouc) is cis-1,4-polyisoprene, and trans-1,4-polyisoprene is present in gutta-percha and balata; it is the structural basis for the terpenes.
• 2-methyl-1,3-butadiene
• Pioneers, pioneers
Source: Wiktionary
I"so*prene, n. Etym: [Etymol. uncertain.] (Chem.)
Definition: An oily, volatile hydrocarbon, obtained by the distillation of caoutchouc or guttaipercha.C5H8 -- unsaturated, and used to make synthetic rubber by polymerization. In organic chemistry, viewed conceptually as the building block of the terpene series of hydrocarbons
Source: Webster’s Unabridged Dictionary 1913 Edition
20 June 2025
(adjective) marked by simplicity; having a humble opinion of yourself; “a modest apartment”; “too modest to wear his medals”
Coffee is a brewed drink prepared from roasted coffee beans, the seeds of berries from certain Coffea species. When coffee berries turn from green to bright red – indicating ripeness – they are picked, processed, and dried. Dried coffee seeds are roasted to varying degrees, depending on the desired flavor.