不定

bùdìng
  1. indefinite
  2. indeterminate
  3. (botany) adventitious

CEDICT

Entry Composition

1 不 bù
  1. no; not so
  2. (bound form) not; un-
2 定 dìng
  1. to fix; to set; to make definite
  2. to subscribe to (a newspaper etc); to book (tickets etc); to order (goods etc)
  3. to congeal; to coagulate
  4. (literary) definitely