What term is used for cloth that is specifically woven of cotton or linen and is heavy?

The term for cloth that is specifically woven of cotton or linen and is heavy is "canvas." Canvas is a durable type of fabric that is characterized by its tight weave, which gives it strength and makes it resistant to wear, tear, and heavy use. It is commonly used in various applications such as sails for boats, tents, tarpaulins, backpacks, and heavy-duty gear due to its robustness. The distinctive qualities of canvas arise from the materials used—cotton or linen—which contribute to its ability to withstand significant stress and environmental conditions.

In contrast, tarp generally refers to a large sheet made from waterproof material, often used for protection against rain or moisture, but it does not specifically denote the weaving technique or the weight associated with canvas. Fabric is a broad term that encompasses various types of woven or knitted materials and does not specifically indicate the heaviness or the type of fiber used. Textile is another general term that refers to any material made of fibers, including woven and non-woven fabrics, but again, it does not specify the characteristics that canvas has.