Meaning of PYRAZOLONE in English

/pi raz"euh lohn', puy-/ , n. Chem.

1. any of the group of heterocyclic compounds containing the pyrazoline ring in which one carbon atom is doubly linked to an oxygen atom not in the ring.

2. the parent compound, C 3 H 4 N 2 O.

[ 1885-90; PYRAZOLE + -ONE ]

Random House Webster's Unabridged English dictionary.      Полный английский словарь Вебстер - Random House .