| TRA | derived by copying something else |
|---|---|
| TRA | ammunition whose flight can be observed by a trail of smoke |
| TRA | (radiology) any radioactive isotope introduced into the body to study metabolism or other biological processes |
| TRA | an instrument used to make tracings |
| TRA | an investigator who is employed to find missing persons or missing goods |
| TRA | ammunition whose flight can be observed by a trail of smoke |
| TRA | decoration consisting of an open pattern of interlacing ribs |
| TRA | membranous tube with cartilaginous rings that conveys inhaled air from the larynx to the bronchi |
| TRA | one of the tubules forming the respiratory system of most insects and many arachnids |
| TRA | relating to or resembling or functioning like a trachea |
| TRA | several small veins from the trachea |
| TRA | long tubular cell peculiar to xylem |