primitive multicellular marine animal whose porous body is supported by a fibrous skeletal framework; usually occurs in sessile colonies;
a follower who hangs around a host (without benefit to the host) in hope of gain or advantage;
someone able to acquire new knowledge and skills rapidly and easily; "she soaks up foreign languages like a sponge";
a porous mass of interlacing fibers the forms the internal skeleton of various marine animals and usable to absorb water or any porous rubber or cellulose product similarly used;
