Correct spelling for the English word "cingule" is [sˈɪŋɡjuːl], [sˈɪŋɡjuːl], [s_ˈɪ_ŋ_ɡ_j_uː_l] (IPA phonetic alphabet).
Cingulum; the fifth cusp of an upper molar tooth; a small tubercle of the lingual surface of a tooth.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.