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equilateral

e·qui·lat·er·al [ kwə láttərəl, èkwə láttərəl ]


adjective 
Definition:
 
with equal sides: describes a geometric figure in which all the sides are of equal length



noun  (plural e·qui·lat·er·als)
Definition:
 
1. equal-sided geometric shape: a geometric figure with all its sides of equal length

2. any side of equal-sided geometric shape: any side of a geometric figure that is the same length as the other sides

[Late 16th century. Directly or via French équilatéral< late Latin aequilateralis< Latin lateralis (see lateral)]

e·qui·lat·er·al·ly adverb
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