無色界
Từ Điển Thuật Ngữ Phật Học Hán Ngữ
Arūpaloka, or Arūpadhātu, the heavens without form, immaterial, consisting only of mind in contemplation, being four in number, which are defined as the 四空天 Catūrūpabrahmaloka, and given as: 空無邊處 Ākāśānantyāyatana, 識無邊處 Vijñānānantyāyatana, 無所有處 Akiñcanyāyatana, 非想非非想處 Naivasaṃjñānāsaṃjñāyatana.