reversal line


Also found in: Dictionary, Thesaurus, Legal, Financial, Encyclopedia.

reversal line

A cement line seen in microscopic sections of bone that shows scallops and irregularities representing earlier bone resorption. Resorption to that point occurred before the process reversed and new bone was formed by apposition. See: Howship lacuna
See also: line
References in periodicals archive ?
Histologically, cementoblastomas reveal sheets of a cementum-like tissue demonstrating numerous reversal lines and active cementoblasts.
Histopathologically the tumor mass is characterized by the formation of sheets of cementum-like tissue which contains numerous basophilic reversal lines. The reversal lines are similar to those observed in Paget disease.
Even such a seemingly complex construction as a word-unit RETEP sonnet is accessible to the patient novice, inasmuch as such poems are built up just one pair of reversal lines at a time, and if one can fashion one complementary pair of word-unit reversal lines of ten syllables each, one can certainly fashion six more and have a sonnet's worth.