Absorber

noun
  1. A device or material that takes in and retains energy, liquid, or other substances. noun
    The shock absorber in the car helps to smooth out the ride over rough terrain.
    Activated charcoal is an effective absorber of toxins in the digestive system.
  2. A person or thing that absorbs or assimilates information, ideas, or influences. noun
    As a quick learner, she is an excellent absorber of new concepts.
    The sponge is an absorber of water, making it ideal for cleaning spills.