A Biodome is an insulated dome-shaped structure with a closed ecological system (CES). The ecosystem doesn't require exchange of matter with the outside world. Biodomes provide a life-supporting habitat in inhospitable places. Such as for human colonies on planets, moons without breathable atmospheres as well as Megaships in space. A biodome can contain farms, forests and parks.
Agricultural Vessels have agricultural domes to cultivate and transport agricultural products. Tourist Ships and Generation Ships have biodomes to grow organic materials and so that passengers can experience an artificial outdoor world.