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1. Multiplied by four; quadruple.
2. Fourth in a group of four identical things.
One of a group of four identical things.
tr. & intr.v. (-kāt′) quad·ru·pli·cat·ed, quad·ru·pli·cat·ing, quad·ru·pli·cates
To multiply or be multiplied four times.

[Latin quadruplicātus, past participle of quadruplicāre, to multiply by four, from quadruplex, fourfold : quadru-, quadri-, quadri- + -plex, -fold; see duplex.]

quad·ru′pli·cate·ly (-kĭt-lē) adv.
quad·ru′pli·ca′tion n.
References in periodicals archive ?
Description of project : Track quadruplication of Milan-Brescia Section: the new HS section (39,6 km), parallel to the conventional line will cross Brescia urban node for about 6,9 km .
More than 95% of [alpha]-thalassemia phenotypes result from meiotic unequal recombinational events between the highly homologous [alpha]1- and [alpha]2-globin loci, which lead mainly to large genomic deletions (3-100 kb), which remove one to four [alpha]-globin genes, and rarely to [alpha]-gene triplication or quadruplication.
However, the introduction of new systems targeted at the lower end of the market will stimulate a quadruplication of navigation system shipments by 2010," reports Christian Mueller, Industry Analyst at Frost & Sullivan.