Bonwill crown triangle — Bon·will crown, triangle (bonґwil) [William Gibson Arlington Bonwill, American dentist, 1833–1899] see under crown and triangle … Medical dictionary
triangle — In anatomy and surgery, a three sided area with arbitrary or natural boundaries. SEE ALSO: trigonum, region. [L. triangulum, fr. tri , three, + angulus, angle] anal t. [TA] the posterior portion of the perineal region through which the … Medical dictionary
Bonwill — William G.A., U.S. dentist, 1833–1899. See B. triangle … Medical dictionary