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supragingival
supragingival adj. 
/ˌsuːprəˈdʒɪn(d)ʒᵻvl/, /ˌsjuːprədʒɪnˈdʒʌɪvl/, /ˌsjuːprəˈdʒɪn(d)ʒᵻvl/, /ˌsuprəˈdʒɪndʒəvəl/ [compare German supragingival (1885 in phonetics, with reference to the position of the tongue, or earlier)] Medicine of, relating to, or located on the part of a tooth that is not covered by the gum (gingiva).
Brit. /ˌsuːprədʒɪnˈdʒʌɪvl/
, /ˌsuːprədʒɪnˈdʒʌɪvl//ˌsuːprəˈdʒɪn(d)ʒᵻvl//ˌsjuːprədʒɪnˈdʒʌɪvl//ˌsjuːprəˈdʒɪn(d)ʒᵻvl/U.S. /ˌsuprədʒᵻnˈdʒaɪvəl/
, /ˌsuprədʒᵻnˈdʒaɪvəl//ˌsuprəˈdʒɪndʒəvəl/ΚΠ
1898 W. C. Barrett Oral Pathol. & Pract. xxviii. 105 No reference here is intended to the hard, black, smooth, supragingival, slow deposit which is but a modification of the usual form of calculus.
1961 Proc. Amer. Philos. Soc. 105 110/1 The aim of the study was to secure information on the timing of the earliest stages of supragingival eruption.
2008 M. Wilson Bacteriol. Humans viii. 241/2 The supragingival surface of the tooth is an aerobic environment.
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