Petavius
[ pi-tah-vee-uhs ]
/ pɪˈtɑ vi əs /
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noun
a walled plain in the fourth quadrant of the face of the moon: about 100 miles (160 km) in diameter from crest to crest.
QUIZ
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Question 1 of 9
Which of the following nouns has an irregular plural form?
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Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022