simple past tense and past participle of quadruplicate

replicated four times

Being four times as long, as big or as many of something.

(transitive) To multiply by four. / (intransitive) To increase by a factor of four. / (rail transport) To provide four parallel running lines on a given stretch of railway.

Something that is four times the usual number, amount, size, etc. / (skating) A figure-skating jump with four revolutions in the air.

having four parts / four times over, multiplied by four

in quadruplicate: four times over, in four copies

To replicate four times; to make fourfold; to quadruple.

multiplication by four

plural of quadruplication