| Subject | English | Arabic |
| math. | addition fact | حقيقة جمعية |
| math. | addition of variates | جمع المتغيرات ؛ اضافة متغيرات |
| comp., MS | addition operator | عامل إضافة (The + character, used to indicate addition or a positive number) |
| environ. | addition polymer A polymer formed by the chain addition of unsaturated monomer molecules, such as olefins, with one another without the formation of a by-product, as water; examples are polyethylene, polypropylene and polystyrene | بلمرة بالإضافة |
| math. | addition sentence | جملة جمعية |
| math. | addition sign | علامة الجمع |
| econ., amer. | addition to surplus | إضافة للاحتياطي العام |
| econ. | addition to taxes | ضرائب إضافية |
| econ. | addition to taxes | زيادة الضرائب |
| econ. | addition to the stock | زيادة رأس المال بضم الاحتياطيات |
| econ. | addition to the stocks | زيادة المخزون |
| genet. | alien addition line | خط إضافى غريب |
| org.name. | General Principles for the Addition of Essential Nutrients to Foods | المبادئ العامّة لإضافة العناصر الغذائيّة الأساسيّة للأغذية |