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ISTHMUS. A tongue or strip of land between two seas. Glos. on Law, 37, book 2, tit. 3, of the Dig.

A Law Dictionary, Adapted to the Constitution and Laws of the United States. By John Bouvier. Published 1856.
References in periodicals archive ?
The purpose of this study was to perform a detailed investigation examination to explore the number of roots and root canals, their configurations, occurrence of isthmi and apical deltas in mandibular permanent first molar teeth in Karachi sample by utilizing clearing technique.
Mechanical debridement either manual or machine assisted fails to clean canal fins, isthmi, cul-de-sacs, and so forth after completion of the preparation and may result in persistent periradicular inflammation [2].