Tetryl

noun

1. A yellow crystalline compound, C7H5N5O8, used as a detonator.
2. The hypothetical radical C4H9, the fourth member of the CnH2n + 1 series: same as butyl.
3. Butyl; -- so called from the four carbon atoms in the molecule.
4. The explosive 2,4,6-trinitrophenyl-N-methylnitramine produced by the nitration of dimethylaniline
5. a yellow crystalline explosive solid that is used in detonators