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noun | adjective
 English thesaurus
Riphean abbr.
abbr. R (MichaelBurov); Riphean era (MichaelBurov); Riphean erathem (MichaelBurov); Riphean epoch (MichaelBurov); Riphean age (MichaelBurov); Riphean time (MichaelBurov)
geol. Riphaean (MichaelBurov)
Riphean adj.
geol. рифейский (MichaelBurov)