內切

内切
nèiqiē
  1. (math.) to inscribe
  2. internally tangent

CEDICT

math

Entry Composition

1 內 nèi
  1. inside
  2. inner
  3. internal
  4. within
  5. interior
2 切 qiē
  1. to cut; to slice; to carve
  2. (math) tangential