pyrene

A noun with two distinct meanings: a pale yellow crystalline hydrocarbon extracted from coal tar, or the small hard nutlet of a drupe or drupelet.

• 🇫🇷Nom avec deux sens distincts : un hydrocarbure cristallin jaune pâle extrait du goudron de houille, ou le petit noyau dur d'une drupe ou d'un fruit à noyau.

1. Chemical compound C2 formal scientific

   A pale yellow crystalline hydrocarbon (C16H10) extracted from coal tar, used in chemical synthesis.

   • Pyrene is a polycyclic aromatic hydrocarbon found in coal tar.
   • The researchers isolated pyrene from the sample for analysis.
   • Pyrene exhibits fluorescence under ultraviolet light.

   🇫🇷Pyrène

2. Botanical structure C2 formal scientific

   The small hard nutlet of a drupe or drupelet, consisting of the seed and the hard endocarp that surrounds it.

   • Each raspberry fruit contains many small pyrenes.
   • The pyrene of a peach is commonly called the pit.
   • Botanists study the structure of pyrenes in various drupes.

   🇫🇷Nucule (ou pyrène) des drupes

   Synonymes: nutletpitstone