sweat bag
Noun: A sweat bag is a porous bag, typically made of canvas, designed to hold water. The water cools through the process of evaporation, often used to provide a cooling effect.
The term "sweat bag" is a specific, compound noun referring to this cooling device. It is not commonly used in everyday modern English. When used, it typically appears in historical or descriptive contexts about cooling methods before mechanical refrigeration.
- In the early 20th century, a sweat bag hanging in a doorway could help cool a room.
- The camper used a sweat bag to keep his drinking water cool during the hike.
The concept relies on evaporative cooling. As water seeps through the porous material and evaporates, it draws heat from the remaining water inside the bag, thereby lowering its temperature.
- Water bag: A more general term for any bag that holds water.
- Evaporative cooler: A modern mechanical device based on the same scientific principle.
- Canteen: A portable container for drinking water, which may sometimes use similar cooling principles if made from a porous material.
- Desert bag
- Cooler bag (in the specific context of evaporative cooling)
This is a fixed compound noun with a single, specific meaning. The words "sweat" and "bag" are not used independently here to convey the meaning; the term functions as a single unit. It should not be confused with a bag used for collecting sweat.
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a porous bag (usually of canvas) that holds water and cools it by evaporation
