A British spelling term for a product, device, or substance that removes or masks odors.
From deodorise + -er (agent noun suffix indicating something that performs an action). Established in British English in the early 1900s with the rise of commercial deodorizing products and sprays.
A deodoriser is often just a fragrant chemical that *masks* smell rather than removes it—companies blur this distinction in marketing, making people think they're actually solving the odor problem when they're just covering it up with perfume.
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