PETRO-


Meaning of PETRO- in English

[ 'pɛtrəʊ ]

■ combining form

1》 of rock; relating to rocks: petrography.

2》 relating to petroleum: petrodollar.

Origin

sense 1 from Gk petros 'stone', petra 'rock'; sense 2 from petroleum .

Concise Oxford English vocab.      Сжатый оксфордский словарь английского языка.