| TRAC | membranous tube with cartilaginous rings that conveys inhaled air from the larynx to the bronchi |
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| TRAC | one of the tubules forming the respiratory system of most insects and many arachnids |
| TRAC | relating to or resembling or functioning like a trachea |
| TRAC | several small veins from the trachea |
| TRAC | long tubular cell peculiar to xylem |
| TRAC | inflammation of the trachea |
| TRAC | genus of Asiatic woody vines with milky sap in leaves and stems |
| TRAC | evergreen Chinese woody climber with shiny dark green leaves and intensely fragrant white flowers |
| TRAC | common respiratory infection characterized by inflammation of the trachea and the bronchi |
| TRAC | in former classifications: comprising plants with a vascular system including ferns and fern allies as well as seed plants |
| TRAC | green plant having a vascular system: ferns, gymnosperms, angiosperms |
| TRAC | a surgical operation that creates an opening into the trachea with a tube inserted to provide a passage for air |