(n) standard of value
(n) (electrical circuit) substrate
(n) naval base
(n) environmental standard
(n) audit standard
(n) mission-critical task
business-critical matter
(n) key industries
(n) (principal) reserve currency
(n) (comp) (obs) canonical format
(n) (comp) benchmark (test)
(n) (comp) Epoch
(n) (comp) reference area
(n) basic medicine
(n) basic science
(n) bed rock
foundation rock
(n) basic technology
generic technology
(n) basic research
(n) foundation engineering
(n) foundation works
(n) basic or standard deduction
(n) infrastructure
(n) preclinical study
basic study
(n) basal body temperature
(n) basal metabolism
(n) fundamental knowledge
(n) deep culture
fundamental culture (term created by German folkorist Hans Naumann)
(n) (military) base closing
(n) (comp) keynote speech
(n) keynote speech
(n) deep structure
underlying structure