pouch

A pouch is a small bag, sac, or flexible container used to hold items or substances. Pouches can be natural, such as anatomical structures, or man-made, such as bags sewn into clothing or worn as accessories.

In biology and medicine, pouches include the marsupial pouch, a skinfold that houses the developing young. In human anatomy there are peritoneal pouches, spaces within the abdominal cavity that can fill with fluid or air, such as the hepatorenal pouch and the pouch of Douglas.

Everyday and gear uses: In clothing and accessories, a pouch is a pocket or small bag used to carry items; examples include waist pouches or coin pouches, and pouches integrated into belts, backpacks, or handbags. In military and outdoor contexts, pouches hold ammunition, tools, or first-aid supplies.

Other notes: The term also covers packaging formats in industry, such as flexible pouches that hold liquids or powders. The word is often used as a general synonym for pocket or sac across various disciplines.