petr- variant of petro-1 before a vowel: petrous. Liberaldictionary.com
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
petr- variant of petro-1 before a vowel: petrous. Liberaldictionary.com
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019