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| abreviatura de pyrogallol; ácido pirogólico | |||
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| piro- (Prefix denoting a substance formed or obtained by heat) | |||
| English thesaurus | |||
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| pyromaniac; pyrotechnics | |||
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| pyrotechnics; pyrotechnical | |||
| pyroxylin | |||
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| quadrangle | |||
| pyrotechnic | |||
| pyrogallol (developer) | |||
| pyrotechnic; pyrotechnical | |||
| pyro: 4 phrases in 3 subjects |
| Earth sciences | 2 |
| Mechanic engineering | 1 |
| Weapons and gunsmithing | 1 |