crestal adjective 1noun 1forms 1 adjective1 •That is situated on, or forms part of, a crest.Microbial samples and peri-implant crestal bone levels of all implant sites were obtained before, during and after the breakdown period. — 2015 noun1 •A scale located on the crest.In the arrangement of the crestals Shinisaurus closely resembles Xenosaurus (in which genus, however, the crestals are blunt and resemble ornamental tack heads) […] — 1955 formscrestals
