These terms are from the FISH Archaeological Objects Thesaurus (Forum on Information Standards in Heritage - FISH).
| Term | Scope note | Term type | SENESCHAL URI | Other URI |
|---|---|---|---|---|
| ORCHARD HOUSE | A forcing house used for various types of fruit which first appeared in the 19th century. Lean-to houses were used for wall-grown fruit and free-standing houses for fruit grown in pots or for trees planted in the ground. | Preferred term | 92811 | - |
| ORCHESTRA PIT | An area normally below a stage or dais occupied by an orchestra or musical group for performances and entertainment. | Preferred term | 138035 | - |
| ORDER | A style of construction following an established set of criteria, based around the conventional use of a type of column. | Preferred term | 138036 | - |
| Ordnance | Narrow term | 79111 | - | |
| Ordnance Ammunition | Narrow term | 79112 | - | |
| ORDNANCE DEPOT | A building or site used by the armed forces for the storage and issuing of military stores and materials. | Preferred term | 160522 | - |
| ORDNANCE DISPOSAL SITE | Site for the disposal of unexploded ordnance, possibly attached to a bombing range. | Preferred term | 164079 | - |
| ORDNANCE FACTORY | A building or site used for the manufacture of small arms and artillery pieces, etc. | Preferred term | 69245 | - |
| Ordnance Office | Narrow term | 92812 | - | |
| ORDNANCE SHIP | A vessel used for carrying weapons and ammunition to warships. | Preferred term | - | - |
| ORDNANCE SLOOP | Preferred term | - | - | |
| ORDNANCE STORE | A building or site used by the armed forces for the storage and issuing of military stores and materials. | Preferred term | 71665 | - |
| ORDNANCE STOREKEEPERS HOUSE | The residence of a storekeeper of naval ordnance. | Preferred term | 92813 | - |
| Ordnance Stores | Narrow term | 79113 | - | |
| Ordnance Survey Office | Narrow term | 92814 | - | |
| ORDNANCE YARD | A storage area usually for naval weapons and stores. | Preferred term | 92815 | - |
| ORE | An unprocessed mineral, collected for the extraction of metals or other substances contained within the mineral. | Preferred term | 79114 | - |
| Ore Bin | Narrow term | 143576 | - | |
| ORE CHUTE | A stone or timber lined channel for conveying ore out of a working. | Preferred term | 142004 | - |
| Ore Crushing Mill | Narrow term | 92816 | - | |
| ORE HEARTH | A furnace for smelting ore in which the fuel and ore are mixed. | Preferred term | 69189 | - |
| Ore Pass | Narrow term | 144590 | - | |
| Ore Shute | Narrow term | 144589 | - | |
| ORE STORE | A storehouse for ore, often found in conjunction with a BLAST FURNACE. | Preferred term | 71785 | - |
| ORE WASHING PLANT | A plant incorporating a range of ore processing operations such as buddles. | Preferred term | 92818 | - |
| ORE WORKS | A site or building where ore is processed to obtain metal. | Preferred term | 111453 | - |
| ORGAN | A musical instrument that produces sound through the passage of air through a number of pipes controlled by stops, pedals and keyboards. | Preferred term | 138037 | - |
| ORGAN | An instrument with a series of pipes at different pitches, the air being produced by bellows, and pipes selected by keyboard or sliders. | Preferred term | 95523 | - |
| ORGAN FACTORY | A factory where musical organs are manufactured. | Preferred term | 92819 | - |
| ORGAN LOFT | A gallery or platform within a place of worship housing the organ. | Preferred term | 159190 | - |
7801 - 7830 of 12,437 records.