| Subject | English | Basque |
| environ. | structure-activity relationship The association between a chemical structure and carcinogenicity | egitura-aktibitate erlazio |
| environ. | structure-borne noise Sound that travels over at least part of its path by means of the vibration of a solid structure | egitura-zarata |
| environ. | structure-borne noise Sound that travels over at least part of its path by means of the vibration of a solid structure | transmisio estrukturaleko zarata |
| environ. | structure plan Metropolitan structure and land use plan intended to outline the general lines along which development should proceed in an area | egitura-plan |