[{"Bold_text": "adjective", "List Items": ["resembling a circle; circular.", "(of the scale of a fish) smooth-edged, more or less circular in form, and having concentric striations.", "(of a fish) having such scales.", "Psychiatry.of or noting a personality type characterized by wide fluctuation in mood within the normal range."]}, {"Bold_text": "noun", "List Items": ["a cycloid fish.", "Geometry.a curve generated by a point on the circumference of a circle that rolls, without slipping, on a straight line."]}]