Perimetric is a term used to describe the measurement of the outer boundaries or limits of an area. The antonyms for perimetric are words that denote the interior or centralized parts of a place or space. These antonyms include "inland," which refers to the inner areas of a country or region, "central," which describes the central or middle part of something, and "interior," which refers to the inside or inner parts of a structure or object. Other antonyms for perimetric include "internal," "inside," and "domestic," all of which describe the parts of an area or place that are closer to its center or core.