| Subject | English | Irish |
| environ. | diffuse agricultural pollution | truailliú talmhaíochta idirleata |
| environ. | diffuse emissions | astaíochtaí idirleata |
| environ. | diffuse pollution Pollution from widespread activities with no one discrete source, e.g. acid rain, pesticides, urban run-off etc. | truailliú idirleata |
| environ. | diffuse pollution | truailliú idirleata |
| environ. | diffuse source Pollution which arises from various activities with no discrete source | foinse idirleata |
| transp. | diffusing lens | lionsa réscaiptheach |
| transp., tech., law | diffusing medium | meán réscaiptheach |
| transp., tech., law | diffusing medium | meán idirleathach |