Adjacent Words

penta- definitions

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Merriam Webster's

or pent- combining form Etymology: Greek, from pente — more at five 1. five <pentahedron> 2. containing five atoms or groups <pentane>

Oxford Reference Dictionary

comb. form 1 five. 2 Chem. (forming the names of compounds) containing five atoms or groups of a specified kind (pentachloride; pentoxide). Etymology: Gk f. pente five

Webster's 1913 Dictionary

Penta- Pen"ta- [Gr. ?, a later combining form of ? five. See Five.] 1. A combining form denoting five; as, pentacapsular; pentagon. 2. (Chem.) Denoting the degree of five, either as regards quality, property, or composition; as, pentasulphide; pentoxide, etc. Also used adjectively.