Definition of quadrinomial in US English:

quadrinomial

adjective

  • Having or using four names; (Mathematics) consisting of four algebraic terms joined by signs of addition or subtraction.

noun

  • Mathematics. A quadrinomial expression.

Origin

Late 17th century. From quadri- + -nomial.

Pronunciation

quadrinomial

/ˌkwɒdrɪˈnəʊmɪəl/