An "orangery" is a building or extension, typically attached to a house or mansion, that is designed to provide a suitable environment for growing orange trees and other citrus fruits. It often features large windows or glass walls to allow sunlight in and create a warm, controlled climate for the plants. The term "orangery" originates from the Latin word "aurantium," meaning orange tree, reflecting its purpose of cultivating these vibrant and fragrant fruits within the comfort of a home.