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| abreviatura de pyrogallol; ácido pirogólico | |||
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| piro- (Prefix denoting a substance formed or obtained by heat) | |||
| Anglais glossaire | |||
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| quadrangle | |||
| pyrotechnic | |||
| pyrotechnic; pyrotechnical | |||
| pyrogallol (developer) | |||
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| pyromaniac; pyrotechnics | |||
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| pyrotechnics; pyrotechnical | |||
| pyroxylin | |||
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PYRO : 4 phrases, 3 sujets |
| Armes et armurerie | 1 |
| Génie mécanique | 1 |
| Sciences de la Terre | 2 |