根式

gēnshì
(math.) a radical; a radical expression

CEDICT

math

Entry Composition

1 根 gēn
  1. root
  2. basis
  3. classifier for long slender objects, e.g. cigarettes, guitar strings
  4. radical (chemistry)

classifier: 條
2 式 shì
  1. type
  2. form
  3. pattern
  4. style