Arm (geography)
narrow extension flowing out from a larger body of water
In geography, an arm is a narrow extension, inlet, or smaller reach, of water flowing out from a much larger body of water, such as an ocean, a sea, or a lake. Although different geographically, a sound or bay may also be called an arm, or vice versa.
Both the tributary and distributary of a river are sometimes called an "arm". By extension, a canal arm is a subsidiary branch of a canal or inland waterway. A number of place names are derived from this term, such as Salmon Arm, Indian Arm and Alice Arm.
Begin with the source’s own compact description: “Arm (geography)” is narrow extension flowing out from a larger body of water. The dossier treats that line as a proposition to test through geography, narrow and extension, not as a finished interpretation.
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The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Jun 5, 2025. The linked authority identifier is Q4792460. None of the 0 selected statements returned an explicit reference.
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This entry incorporates text from “Arm (geography)” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.