👉 The term "mere fluid" refers to a concept in physics and biology that describes fluids as substances that exhibit properties of both liquids and gases, but are often treated more like liquids due to their density and viscosity. In essence, a mere fluid is a substance that flows easily under the influence of gravity or other forces but does not have a fixed shape, taking the form of its container. This fluid behavior is due to the intermolecular forces within the substance, which are weaker than those holding a gas together but strong enough to prevent immediate collapse into a fixed shape. Examples include water, air, and many biological fluids like blood and mucus, which can flow but maintain a certain volume and shape when at rest.
