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dec-
dec.
deca-
decade
decadence
decadent
decaf
decaffeinated
decagon
decagram
decahedron
decahydrate
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decalcify
decalcomania
decalescence
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decagon
dec·a·gon [ dékə gòn ] (plural dec·a·gons)


noun 
Definition:
 
ten-sided geometric shape: a polygon with ten straight sides and ten angles
[Mid-17th century. Via medieval Latin< Greek dekagōnos "ten-angled"]

de·cag·o·nal [ də kággən'l ] adjective
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