pyrene

• 名词，有两个主要义项：一是从煤焦油中提取的淡黄色结晶烃（芘）；二是核果或核果状果实内的小而硬的果核（果核、种核）。

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.

1. Chemical compoundC2formalscientific

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

   化学化合物

   • 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.

2. Botanical structureC2formalscientific

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

   果核

   • 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.

   同义词nutletpitstone