Nev. Rev. Stat. § 362.105 — “Royalty” defined

As
used in NRS 362.100 to 362.240 , inclusive, unless the context
otherwise requires:
1.  “Royalty” means a portion of the
proceeds from extraction of a mineral which is paid for the privilege of
extracting the mineral.
2.  “Royalties” do not include:
(a) Rents or other compensatory payments which
are fixed and certain in amount and payable periodically over the duration of
the lease regardless of the extent of extractions; or
(b) Minimum royalties covering periods when no
mineral is extracted if the payments are fixed and certain in amount and
payable on a regular periodic basis.