retardant

retardant
retardance, retardancy, n.
/ri tahr"dnt/, n. Chem.
1. any substance capable of reducing the speed of a given reaction.
adj.
2. retarding or tending to retard (usually used in combination): fire-retardant construction materials.
[1635-45; RETARD + -ANT]

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Universalium. 2010.

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