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English definition of “decimal”

decimal

adjective [not gradable]  /ˈdes·ə·məl/ us  
of a system of counting or money based on the number ten

decimal

noun [C] /ˈdes·ə·məl/
a number expressed using a system of counting based on the number ten: Three-fifths expressed as a decimal is 0.6.
(Definition of decimal from the Cambridge Academic Content Dictionary © Cambridge University Press)
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