śikhin, 式棄; 式詰; 尸棄那 (or 尸棄佛); 罽那尸棄; crested, or a fame; explained by 火 fire; 刺那尸棄 Ratnaśikhin occurs in the Abhidharma. In the 本行經 it is 螺髻 a shell like tuft of hair. (1) The 999th Buddha of the last kalpa, whom Śākyamuni is said to have met. (2) The second of the seven Buddhas of antiquity, born in Prabhadvaja 光相城 as a Kṣatriya. (3) A Mahā-brahmā, whose name Śikhin is defined as 頂髻 or 火災頂 having a flaming tuft on his head; connected with the world-destruction by fire. The Fanyimingyi 翻譯名義 describes Śikhin as 火 or 火首 fame, or a flaming head and as the god of fire, styled also 樹提 śuddha, pure; he observed the 火定 Fire Dhyāna, broke the lures of the realm of desire, and followed virtue.

A Dictionary of Chinese Buddhist Terms, William Edward Soothill and Lewis Hodous