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trefoil arch
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noun Architecture.
an arch with cusplike intrados.
QUIZ
GOOSES. GEESES. I WANT THIS QUIZ ON PLURAL NOUNS!
Test how much you really know about regular and irregular plural nouns with this quiz.
Question 1 of 9
Which of the following nouns has an irregular plural form?
Words nearby trefoil arch
treeware, tree yucca, tref, treflé, trefoil, trefoil arch, trefoil knot, trehala, trehalose, treillage, Treinta y Tres
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022