Diffuser and Circulation

noun

• Baffle that distributes sound waves evenly.
  • synonyms: diffusor
• Optical device that distributes the light of a lamp evenly.
  • synonyms: diffusor

noun

• The dissemination of copies of periodicals (as newspapers or magazines. )
• Movement through a circuit; especially the movement of blood through the heart and blood vessels.
• Library science. ( the count of books that are loaned by a library over a specified period)
• Number of copies of a newspaper or magazine that are sold.
  • usage: "by increasing its circulation the newspaper hoped to increase its advertising"
• Free movement or passage (as of cytoplasm within a cell or sap through a plant. )
  • usage: "ocean circulation is an important part of global climate"; "a fan aids air circulation"
• The spread or transmission of something (as news or money) to a wider group or area. .

• (n.) The act of moving in a circle or in a course which brings the moving body to the place where its motion began.
• (n.) The movement of the blood in the blood-vascular system, by which it is brought into close relations with almost every living elementary constituent. Also, the movement of the sap in the vessels and tissues of plants.
• (n.) The extent to which anything circulates or is circulated; the measure of diffusion; as, the circulation of a newspaper.
• (n.) Currency; circulating coin; notes, bills, etc., current for coin.
• (n.) The act of passing from place to place or person to person; free diffusion; transmission.