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