| TRA | a set of nonsensical syllables used while humming a refrain |
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| TRA | a set of nonsensical syllables used while humming a refrain |
| TRA | (architecture) not arcuate |
| TRA | (architecture) not arcuate |
| TRA | rod-shaped structures of fibrous tissue that divide an organ into parts (as in the penis) or stabilize the structure of an organ (as in the spleen) |
| TRA | of or relating to trabeculae |
| TRA | of or relating to trabeculae |
| TRA | either of two lines that connect a horse's harness to a wagon or other vehicle or to a whiffletree |
| TRA | drawing created by tracing |
| TRA | a clue that something has been present |
| TRA | a suggestion of some quality |
| TRA | a just detectable amount |