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penta-
pentachlorophenol
pentacle
pentad
pentadactyl
pentaerythritol
pentaerythritol tetranitrate
Pentagon
pentagon
Pentagonese
pentagram
pentahedron
pentamerous
pentameter
pentamidine
pentane
pentangle
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pentagon

pen·ta·gon [ péntə gòn ] (plural pen·ta·gons)


noun 
Definition:
 
5-sided figure: a two-dimensional geometric figure formed of five sides and five angles

[Late 16th century. Via late Latin< Greek pentagōnon< pentagōnos "five-angled" < penta- "five" + gōnia "angle"]

pen·tag·o·nal [ pen tággən'l ] adjective
pen·tag·o·nal·ly adverb
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