unnilseptium: Meaning and Definition of

un•nil•sep•ti•um

Pronunciation: (y"nil-sep'tē-um), [key]
— n.
  1. provisional name for the transuranic element with atomic number 107. Symbol: Uns&hasp; Also called
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.