INTERVENOR
Meaning of INTERVENOR in English
/in'teuhr vee"neuhr/ , n.
a person who intervenes, esp. in a lawsuit.
Also, intervener .
[ 1615-25; INTERVENE + -OR 2 ]
Random House Webster's Unabridged English dictionary.
Полный английский словарь Вебстер - Random House .
2012