[{"Bold_text": "noun", "List Items": ["Anatomy.a muscular, membranous or ligamentous wall separating two cavities or limiting a cavity.the partition separating the thoracic cavity from the abdominal cavity in mammals.", "a muscular, membranous or ligamentous wall separating two cavities or limiting a cavity.", "the partition separating the thoracic cavity from the abdominal cavity in mammals.", "Physical Chemistry.a porous plate separating two liquids, as in a galvanic cell.a semipermeable membrane.", "a porous plate separating two liquids, as in a galvanic cell.", "a semipermeable membrane.", "a thin disk that vibrates when receiving or producing sound waves, as in a telephone, microphone, speaker, or the like.", "Also called pessary .a thin, dome-shaped device, usually of rubber, for wearing over the uterine cervix during sexual intercourse to prevent conception.", "a plate with a hole in the center or a ring that is placed on the axis of an optical instrument, as a camera, and that controls the amount of light entering the instrument.", "a plate or web for stiffening metal-framed constructions."]}, {"Bold_text": "verb (used with object)", "List Items": ["to furnish with a diaphragm.", "to reduce the aperture of (a lens, camera, etc.) by means of a diaphragm."]}]