petrochemistry

[ pe-troh-kem-uh-stree ]
/ ˌpɛ troʊˈkɛm ə stri /

noun

the branch of chemistry dealing with petroleum or its products.
the chemistry of rocks.

Origin of petrochemistry

1935–40; petro-2 or petro-1 + chemistry

British Dictionary definitions for petrochemistry

petrochemistry
/ (ˌpɛtrəʊˈkɛmɪstrɪ) /

noun

the chemistry of petroleum and its derivatives
the branch of chemistry concerned with the chemical composition of rocks