Dictionary Definition :
Definition[1]
:
sphere : (nt.) goḷa; goḷaka; maṇḍala; āyatana; visayaṭṭhāna. (m.) āvaṭṭa.
Source
:
A.P. Buddhadatta Mahathera, Concise Pali-English and English-Pali Dictionary [available as digital version from Metta Net, Sri Lanka]