Definition of hendecagon in English:

hendecagon

noun

  • A plane figure with eleven straight sides and angles.

    • ‘The regular hendecagon cannot be constructed using the classical Greek rules of geometric construction.’
    • ‘The loonie is a seven-gram, 11-sided disk - technically a hendecagon - 26.5 millimetres in diameter and 1.75 millimetres thick.’
    • ‘Though hendecagons are the most flexible polygons we have examined, there is a downside.’
    • ‘The hendecagons in the model are not quite regular.’

Origin

Early 18th century: from hendeca- ‘eleven’ + -gon, on the pattern of words such as polygon.

Pronunciation

hendecagon

/henˈdekəˌɡän//hɛnˈdɛkəˌɡɑn/