ATOMIC NUMBER 23(noun) Did you mean: Synonyms Rhymes Also try: atomicnumberDefinitions There is 1 meaning of the phrase Atomic Number 23. Atomic Number 23 - as a noun A soft silvery white toxic metallic element used in steel alloys; it occurs in several complex minerals including carnotite and vanadinite Synonyms (Exact Relations)vvanadium 14A-Z Proximitiesatoll 5atolls 6atom 6atom-bombatomic 10 Atomic Number 23 atomical 12atomically 17atomicities 15atomicity 16atomics 11