Definition of petrochemically in US English:

petrochemically

adverb

  • In relation to petrochemistry; by a petrochemical process or method.

adverb

  • In relation to the chemistry of petroleum; by a petrochemical process or method.

Origin

1950s. From petrochemical + -ly<br>1960s; earliest use found in The Economist. From petrochemical + -ly.

Pronunciation

petrochemically

/ˌpɛtrəʊˈkɛmɪkli/