Adjective
Balfourian (comparative more Balfourian, superlative most Balfourian)
Of or relating to Arthur Balfour (1848–1930), British Conservative politician who was the Prime Minister of the United Kingdom from July 1902 to December 1905.
Most of the Balfourian series are represented by Sleumer as subsections, though some appear as sections or even subgenera. Source: Internet
While Sleumer's work was widely accepted, many in the United States and the United Kingdom continued to use the simpler Balfourian system of the Edinburgh group. Source: Internet