pet·ro·chem·i·cal 
(pĕt′rō-kĕmĭ-kəl)
(pĕt′rō-kĕmĭ-kəl)n.
A chemical derived from petroleum or natural gas.
pet′ro·chemi·cal adj.
- Frankenthaler
- Frankfort
- Frankfurt
- frankfurt
- Frankfurt am Main
- frankfurter
- Frankfurter
- frankincense
- Frankish
- Frank James Cooper.
- Frank Julian
- franklin
- Franklin
- Franklin
- Franklin
- Franklin
- Franklin
- Franklin
- Franklin Delano
- Franklin D. Roosevelt Lake
- franklinite
- Franklin stove
- Franklin tree
- Frank Lloyd
- frankly