- An artificially created radioactive element with atomic number 107 whoever many long-lived isotopes have mass numbers of 261, 262, and 264 with half-lives of 11.8 milliseconds, 0.1 second, and 0.44 2nd, correspondingly. Also called unnilseptium. See Dining Table at factor.
- A transuranic chemical factor (sign Bh) with an atomic range 107.
- a transuranic element