An Etymological Dictionary of Astronomy and Astrophysics

Fourfold; consisting of four parts.

Etymology (EN): M.E. from L. quadruplus, from quadru-

• duple, from duplus, from du(o) “two” + -plus “fold.”

Etymology (PE): Cahârtâ, from cahâr, → four, cognate with L. quattuor, + tâ “fold, plait, ply; piece, part” (Mid.Pers. tâg “piece, part”).