{"era":"current","word":"uranium","meaning":"a radioactive metallic chemical element","children":[{"era":"classical / modern scientific","word":"Uranus","meaning":"the planet name borrowed from Greek Ouranos","children":[{"era":"1700s","word":"uranium","meaning":"the element name formed from Uranus","children":[{"era":"classical","word":"Οὐρανός (Ouranós)","meaning":"sky, heaven","children":[],"language":"Greek"}],"language":"New Latin"}],"language":"Latin"}],"language":"Modern English"}