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  • (acoustics)
  1. The property of a material that changes acoustic energy into (usually) heat energy. A material or surface that absorbs sound waves does not reflect them. Absorption of a given material is frequency dependent as well as being affected by the size, shape, location, and mounting method used. Source: Church Audio & Acoustics Glossary
  2. In acoustics, the changing of sound energy to heat. Source: http://www.owenscorning.com/around/sound/glossary.asp
  • (biology) the taking up of substances or their passage through the walls of cells Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby
  • (biotechnology) The process of absorbing; specifically:
  1. In physiology, it refers to the movement of liquids and solutes into cells by way of diffusion or osmosis.
  2. In chemistry, it refers to the drawing of a gas or liquid into the pores of a permeable solid.
  3. In immunology, it refers to a process in which an antigen or antibody is used to pull an analogous antigen or antibody out of a solution.
  • (environment) The uptake of water, other fluids, or dissolved chemicals by a cell or an organism (as tree roots absorb dissolved nutrients in soil.) Source: Terms of the Environment
  • (geology)
  1. The phenomenon observed when a pleochroic mineral is rotated in plane polarized light. In certain positions, the mineral is darker than in others, owing to the absorption of light.
  2. In hydrology, a term applied to the entrance of surface water into the lithosphere by all methods. AGI
  3. The reduction of light intensity in transmission through an absorbing substance or in reflection from a surface. In crystals, the absorption may vary with the wavelength and with the electric vector of the transmitted light with respect to crystallographic directions.
  4. Any mechanism by which energy, e.g., electromagnetic or seismic, is converted into heat.
  5. Taking up, assimilation, or incorporation, e.g., of liquids in solids or of gases in liquids. CF: adsorption
  6. The entrance of surface water into the lithosphere by any method.
    Source: Dictionary of Mining, Mineral, and Related Terms

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