{"era":"current","word":"milligram","meaning":"a unit of mass equal to one thousandth of a gram","children":[{"era":"1700s","word":"milligramme","meaning":"a thousandth of a gram","children":[{"era":"1700s","word":"milli- + gramme","meaning":"thousandth + gram","children":[],"language":"French"}],"language":"French"}],"language":"Modern English"}