Why is the ninth month called September?
word-forming element meaning "many, much, multi-, one or more," from Greek poly-, combining form of polys "much" (plural polloi); cognate with Latin plus, from PIE root *pele- (1) "to fill," with derivatives referring to multitudinousness or abundance (cf. Sanskrit purvi "much," prayah "mostly;" Avestan perena-, Old Persian paru "much;" Greek plethos "people, multitude, great number," polys "much, plenty," ploutos "wealth;" Lithuanian pilus "full, abundant;" Old Church Slavonic plunu; Gothic filu "much," Old Norse fjöl-, Old English fela, feola "much, many;" Old English folgian; Old Irish lan, Welsh llawn "full;" Old Irish il, Welsh elu "much"); probably related to root *pele- (2) "to spread."
Properly used in compounds only with words of Greek origin. In chemical names, usually indicating a compound with a large number of atoms or molecules of the same kind (cf. polymer).
More than one; many; much: polyatomic.
More than usual; excessive; abnormal: polydipsia.
Polymer; polymeric: polyethylene.
A prefix meaning "many," as in polygon, a figure having many sides. In chemistry, it is used to form the names of polymers by being attached to the name of the base unit of which the polymer is made, as in polysaccharide, a polymer made of repeating simple sugars (monosaccharides).
1. A polymorphic, block-structured language developed by D.C.J. Matthews at Cambridge in the early 1980s.
["An Overview of the Poly Programming Language", D.C.J. Matthews, in Data Types and Persistence, M.P. Atkinson et al eds, Springer 1988].
2. A language developed at St Andrews University, Scotland.
[Software Practice & Exp, Oct 1986].
3. A polymorphic language used in the referenced book.
["Polymorphic Programming Languages", David M. Harland, Ellis Horwood 1984].