| Subject | English | Irish |
| econ., market. | addition for profit | gan brabús a thuillfí san áireamh |
| agric., sugar. | addition of sucrose in aqueous solution | siúcrú agus uisciú |
| agric., sugar. | addition of sucrose in aqueous solution | siúcrós a chur le tuaslagán uisciúil |
| hobby, agric. | addition of tannin | tainnin a chur le |
| comp., MS | addition operator | oibreoir suimiúcháin (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 | polaiméir shuimiúcháin |
| chem. | addition polymerisation | polaiméiriú suimiúcháin |
| chem. | addition reaction | imoibriú suimiúcháin |
| market. | additions to fixed assets | sócmhainní dochta breise |
| environ. | chemical addition Chemical reaction in which one or more of the double bonds or triple bonds in an unsaturated compound is converted to a single bond by the addition of other atoms or groups | suimiúchán ceimiceach |
| agric. | grape must with fermentation arrested by the addition of alcohol | úrfhíon fíonchaor agus é coiscthe ó choipeadh trí alcól a chur leis |
| agric. | grape must with fermentation arrested by the addition of alcohol | úrfhíon fíonchaor |
| gen. | in addition | ina theannta sin |
| gen. | in addition | thairis sin |
| patents. | in addition to the responsibilities | i dteannta na gcúraimí |
| gen. | to make additions to list | cuir le liosta |