I found several results for the term "tum," but they seem to refer to different things. Heres a summary of what I found:
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Tum (verb): According to Merriam-Webster, "tum" is a verb that means to card wool as a preliminary to finer carding, or to open or tease out wool before carding.
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Tums (antacid): Tums is an antacid made of sucrose and calcium carbonate that is used to treat heartburn, indigestion, and an upset stomach. It was named in 1930 after a radio contest, which was won by a nurse who came up with the phrase "Tums for the Tummy".
Its unclear from the search results what "tum" might refer to in a different context. If you have any additional information or context, Id be happy to try to help you further.
