Definition/Meaning  Word/Phrase 
cardinal number that is the sum of nine and one; the base of the decimal system 
10
,
decade
,
ten
,
tenner
,
X

Arabic (or decimal) system of numeration 
algorism

decimal system 
algorism
,
Arabic system

decimal with a sequence of digits that repeats itself indefinitely 
circulating decimal
,
recurring decimal
,
repeating decimal

number in the decimal system 
decimal

digit from 0 to 9 in decimal notation 
decimal digit

positional system of numeration that uses decimal digits and a base of ten 
decimal number system
,
decimal numeration system
,
decimal system

dot at the left of a decimal fraction 
decimal point
,
percentage point

system used by libraries to classify nonfictional publications into subject categories; the subject is indicated by a threedigit numeral and further specification is given by numerals following a decimal point; publications are shelved by number 
decimal system of classification
,
Dewey decimal classification
,
Dewey decimal system

act of changing to a decimal system 
decimalisation
,
decimalization

United States librarian who founded the decimal system of classification (18511931) 
Dewey
,
Melvil Dewey
,
Melville Louis Kossuth Dewey

average number of binary digits needed to express one radix digit in a numeration system that is not binary; on the average a number that can be expressed in N decimal digits takes 3.3N binary digits 
equivalentbinarydigit factor

radix numeration system in which the location of the decimal point is fixed by convention 
fixedpoint notation
,
fixedpoint representation system

radix numeration system in which the location of the decimal point is indicated by an exponent of the radix; in the floatingpoint representation system, 0.0012 is represented as 0.122 where 2 is the exponent 
floatingpoint notation
,
floatingpoint representation system

Scottish mathematician who invented logarithms; introduced the use of the decimal point in writing numbers (15501617) 
John Napier
,
Napier

logarithm decimal part 
mantissa

decimal system of weights and measures based on the meter and the kilogram and the second 
metric system

decimal unit of weight based on the gram 
metric weight unit
,
weight unit

decimal unit of measurement of the metric system (based on meters and kilograms and seconds) 
metric
,
metric unit

decimal point 
radix point
