[{"Bold_text": "adjective", "List Items": ["simple; consisting of or characterized by a single element.", "pertaining to or noting a telecommunications system permitting communication in only one direction at a time."]}, {"Bold_text": "noun", "List Items": ["Mathematics.a basic geometric element in a Euclidean space, being a line segment in one dimension, a triangle in two dimensions, a tetrahedron in three dimensions, and so on: used in topology and linear programming.", "an apartment having all the rooms on floor."]}]