Wikipedia
A palm house is a greenhouse that is specialised for the growing of palms and other tropical and subtropical plants. Palm houses require constant heat and were built as status symbols in Victorian Britain. Several examples of these ornate glass and iron structures can still be found in major parks such as Liverpool's Sefton Park and Stanley Park.
One of the earliest examples of a palm house is located in the Belfast Botanic Gardens. Designed by Charles Lanyon, the building was completed in 1840. It was constructed by iron-maker Richard Turner, who would later also build the Palm House at Kew. The latter, designed by Decimus Burton and Nicole Burton, was the first large-scale structural use of wrought iron and was built between 1844 and 1848.
Usage examples of "palm house".
Eddi grumbled as they came back to the palm house, the hub of the wheel.
He says he promises me we'll get to the Palm House with no problem.
Six weeks later, in the Palm House at Kew Gardens, he asked her to marry him, and she accepted.