conservatory
Pronunciation: /kənˈsəːvət(ə)ri/
noun ( plural conservatories)
- 1British a room with a glass roof and walls, attached to a house at one side and used as a sun lounge or for growing delicate plants: keep plant cuttings in a frost-free conservatory or greenhouse
- 2North Americananother term for conservatoire.

Origin:
mid 16th century (denoting something that preserves): from late Latin conservatorium, from conservare 'to preserve' (see conserve)

Spelling help
The ending of conservatory is spelled -ory.