SORORATE
Meaning of SORORATE in English
/sawr"euh rayt', sohr"-/ , n.
subsequent or concurrent marriage with a wife's sister.
[ 1905-10; soror- (s. of soror ) SISTER + -ATE 3 ]
Random House Webster's Unabridged English dictionary.
Полный английский словарь Вебстер - Random House .
2012