The transverse ridges and grooves on the surface of tooth enamel. ... Origin: peri-+ G. Kyma, wave ... (05 Mar 2000) ... 
(per″e-ki´mә-tә) the numerous small transverse ridges on the surface of the enamel of permanent teeth, representing overlapping prism groups; continued abrasion erodes the enamel surface and obliterates them.
Type: Term Pronunciation: per′i-kī′mă-tă, -kī′mă Definitions: 1. Transverse ridges and grooves on the surface of tooth enamel.