{"era":"current","word":"physicist","meaning":"a scientist who studies matter, energy, and the laws of nature","children":[{"era":"current","word":"physics","meaning":"the science of matter, energy, and motion","children":[{"era":"Middle French","word":"physique","meaning":"physics; natural science","children":[{"era":"late classical","word":"physica","meaning":"natural science","children":[{"era":"classical","word":"physikē / physika","meaning":"natural things; natural philosophy","children":[{"era":"classical","word":"physis","meaning":"nature","children":[],"language":"Greek"}],"language":"Greek"}],"language":"Latin"}],"language":"French"}],"language":"Modern English"},{"era":"classical","word":"-ist","meaning":"person connected with a subject or practice","children":[],"language":"Greek"}],"language":"Modern English"}