{"era":"current","word":"greenhouse","meaning":"A building, usually made of glass, used for cultivating plants that require warmth and protection.","children":[{"era":"17th century","word":"greenhouse","meaning":"a house for green plants","children":[{"era":"pre-1100","word":"green","meaning":"green, verdant","children":[],"language":"Old English"},{"era":"pre-1100","word":"house","meaning":"dwelling, building","children":[],"language":"Old English"}],"language":"English"}],"language":"Modern English"}