| Arabic | English |
| مُجَمِّع - مُراكِم | accumulator A rechargeable device for storing electrical energy in the form of chemical energy, consisting of one or more separate secondary cells |
| مجمع حاويات | tank farm Storage space for containers of liquids or gases |
| مجمع حضري | conurbation 1. A large densely populated urban sprawl formed by the growth and coalescence of individual towns or cities. 2. Large area covered with buildings (houses or factories or public building, etc.) 3. A large area occupied by urban development, which may contain isolated rural areas, and formed by the merging together of expanding towns that formerly were separate |
| مجمع شمسي | solar collector Device which converts the energy from light into electricity. The collector system contains a concentrator and a receiver. The concentrator redirects and focuses sunlight on the receiver by using mirrors or lenses, and the receiver absorbs solar radiation and converts it to heat |
