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| a fool or simpleton; ninny. |
| a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes. |
| petro- or (before a vowel) petr- | |
| —combining form | |
| 1. | indicating stone or rock: petrology |
| 2. | indicating petroleum, its products, etc: petrochemical |
| 3. | of or relating to a petroleum-producing country: petrostate |
| [from Greek petra rock or petros stone] | |
| petr- or (before a vowel) petr- | |
| —combining form | |
| [from Greek petra rock or petros stone] | |
petro- or petri- or petr-
pref.
Rock; stone; stone-like hardness: petrous.