pyrene

== English == === Pronunciation === === Etymology 1 === From pyr- +‎ -ene. ==== Noun ==== pyrene (plural pyrenes) (chemistry) A polycyclic aromatic hydrocarbon containing four fused benzene rings; first isolated from coal tar ===== Derived terms ===== ===== Translations ===== === Etymology 2 === From Ancient Greek πῡρήν (pūrḗn, “fruit-stone”). ==== Noun ==== pyrene (plural pyrenes) (botany) Alternative form of pyrena. === Anagrams === repyne