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Definition of tetrahedron noun from the Oxford Advanced Learner's Dictionary

tetrahedron

noun
 
/ˌtetrəˈhiːdrən/
 
/ˌtetrəˈhiːdrən/
 (geometry)
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  1. a solid shape with four flat sides that are trianglesTopics Colours and Shapesc2
    Word Originlate 16th cent.: from late Greek tetraedron, neuter (used as a noun) of tetraedros ‘four-sided’.
See tetrahedron in the Oxford Advanced American Dictionary
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Nearby words

trait
noun
 
 
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