[{"Bold_text": "noun", "List Items": ["an act or instance of converging .", "a convergent state or quality.", "the degree or point at which lines, objects, etc., converge.", "Ophthalmology.a coordinated turning of the eyes to bear upon a near point.", "Physics.the contraction of a vector field.a measure of this.", "the contraction of a vector field.", "a measure of this.", "Meteorology.a net flow of air into a given region.Compare divergence(def2) divergence(def2).", "Biology.similarity of form or structure caused by environment rather than heredity."]}]