Prior to decimalisation (specifically the decimalisation of British and Irish currency).

Alternative spelling of predecimalization

A method of writing IP addresses with where value of each byte is given as a decimal number, and each byte separated by a dot.

(mathematics) A decimal representation of a real number that, at some point, becomes periodic (and repeats some sequence of digits infinitely)

(dated) A binary (base-2) numeral. / (informal) Used other than figuratively or idiomatically: A decimal (numeral written as a concatenation of successive negative powers of the base) in base 2..

(idiomatic) ten, a group of ten

plural of decimal candle

(historical) A photometric standard formerly used in France, having the value of one twentieth of the Violle platinum standard, or slightly less than a British standard candle.

plural of decimal dozen

(mathematics, informal) Bijective numeration in base ten.