noun

• (organic chemistry) A white transparent waxy crystalline isoprenoid ketone, 1,7,7-trimethylbicyclo[2.2.1]heptan-2-one, with a strong pungent odour, used in pharmacy, also known as laurel camphor or common/ordinary camphor.
  "Yet, oddly enough, I found a far unlikelier substance, and that was camphor. I found it in a sealed jar, that by chance, I suppose, had been really hermetically sealed. I fancied at first that it was paraffin wax, and smashed the glass accordingly. But the odour of camphor was unmistakable. In the universal decay this volatile substance had chanced to survive, perhaps through many thousands of centuries."
• (organic chemistry) a plant-extracted crystalline substance similar to common camphor, especially Borneo camphor.