Englishfor English speakers
electro
noun
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(countable, obsolete) An electrotype.
—
The musical genre
electro
verb
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(archaic) To electrotype.
retarder
noun
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Something which retards or slows.
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(mechanical, _, engineering) A device for slowing down large trucks, lorries, buses, shunted railway wagons.
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(baking) A refrigerator used to slow down proofing of yeast when making dough.