{"era":"current","word":"evolution","meaning":"gradual development or biological change","children":[{"era":"1600s","word":"evolution","meaning":"an unfolding or opening out","children":[{"era":"classical","word":"evolutio","meaning":"an unfolding, opening","children":[{"era":"classical","word":"evolvere","meaning":"to unroll, unfold","children":[{"era":"classical","word":"ex + volvere","meaning":"out + to roll","children":[],"language":"Latin"}],"language":"Latin"}],"language":"Latin"}],"language":"Middle English"}],"language":"Modern English"}