| Subject | English | Arabic |
| environ. | air-borne trace element | عناصر نادرة منقولة بالريح |
| environ. | air-borne trace element | عناصر نادرة ذات مصدر جَوِّي |
| environ. | trace element Any of various chemical elements that occur in very small amounts in organisms and are essential for many physiological and biochemical processes | آثار عنصر |
| food.serv. | trace element | عناصر نادرة |