A device and technique described in Napier's treatise Rabdologiæ for performing multiplication, division and extraction of square roots by using counters to represent numbers in binary.
Origin
, coined by Scottish landowner and mathematician John Napier (1550–1617) in his 1617 treatise Rabdologiæ (written in Latin).
Modern English dictionary
Explore and search massive catalog of over 900,000 word meanings.
Word of the Day
Get a curated memorable word every day.
Challenge yourself
Level up your vocabulary by setting personal goals.