noun. ['ˌpɛtroʊˈkɛmɪkəl'] any compound obtained from petroleum or natural gas.
1. Noun, singular or mass Acrylic fibers come from acrylonitrile -- a petrochemical -- first made in Germany in the early 1800s. 2. Adjective PVA glues are relatively inexpensive and non-toxic through contact with skin; however, they do contain petrochemical compounds.
