[{"Bold_text": "noun", "List Items": ["the act of replacing .", "a person or thing that replaces :summer replacements for vacationing staff; a replacement for a broken dish.", "Military.a sailor, soldier, or airman assigned to fill a vacancy in a military unit.", "Also called metasomatism .Geology.the process of practically simultaneous removal and deposition by which a new mineral grows in the body of an old one."]}]