数域 shùyù number field Origin Definitions Defs Strokes Stroke Words Sentences Sents 复数域 fùshùyù complex field field of complex numbers in mathematics, usually denoted by C代数数域 dàishùshùyù algebraic number field algebraic number field (math.)有理数域 yǒulǐshùyù rational field field of rational numbers (math.), usually denoted by Q