n A shapeless or amorphous mass; a vague shape or amount, especially of a liquid or semisolid substance; a clump, group or collection that lacks definite shape.
n In astronomy, a large cloud of gas. In particular, an 'extended Lyman-Alpha blob' is a huge body of gas that may be the precursor to a galaxy.[http://www.sciencedaily.com/releases/2009/04/090422151828.htm]