PYRONE
Meaning of PYRONE in English
/puy"rohn, puy rohn"/ , n. Chem.
either of two heterocyclic ketones having the formula C 5 H 4 O 2 .
[ 1890-95; PYR- + -ONE ]
Random House Webster's Unabridged English dictionary.
Полный английский словарь Вебстер - Random House .
2012