structural word
Grammar
noun
= function word.
Origin
Late 19th century.
- Petrobrusian
- petrochemical
- petrochemically
- petrochemistry
- pet rock
- petrocurrency
- petrodollar
- petrofabric
- petrofabrics
- Petro-Forge
- petrog.
- petrogenesis
- petrogenetic
- petrogenetically
- petrogenic
- petrogeny
- petroglyph
- petroglyphic
- petroglyphy
- Petrograd
- petrograph
- petrographer
- petrographic
- petrographical
- petrographically