R and Q are not used for anything else, really, in terms of units or SI prefixes. [The prefix names themselves are] very, very loosely based on the Greek and Latin names for nine and 10.

For the first time in 30 years, new terms have been officially added to the International System of Units. The four new prefixes – ronna, quetta, ronto and quecto – describe very large and ...

Although they will become SI prefixes with immediate effect, it might take a while for scientists to adopt them in their work. Some scientists are sceptical of whether they will be helpful at all.

Say hello to the first new SI prefixes since 1991. At the humongous end of the scale, ronna and quecca now denote 10 27 and 10 30, respectively. Apparently, the mass of the Earth is six ronnagrams, or ...

Since the SI was established in 1960, scientific need has led to a growing number of prefixes. The last time was in 1991, when chemists wanting to express vast molecular quantities spurred the ...