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/ˈmemˌbrān/ Noun, pl. membranes 1. A mechanical, thin, flat flexible part that can deform or vibrate when excited by an external force. ( 2. A flexible or semi-flexible covering or waterproofing whose primary function is to exclude water. ( 3. A thin layer of tissue that covers a surface, lines a cavity, or divides a space or organ. ( (Biology) 1. A thin layer of tissue covering a surface or lining a cavity, space or organ. ( 2. A flexible enclosing or separating tissue forming a plane or film and separating two environments (usually in a plant or animal). ( 3. A cell membrane. ( (Chemistry) 1. A thin pliable sheet of material that is permeable to substances in solution. ( Word origin: A term in anatomy, from Latin membrana “a skin, membrane; parchment (skin prepared for writing),” from membrum “limb, member of the...

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/ˈmem(ə)rē/ Noun, pl. memories 1. The area of cognitive psychology that studies memory processes. ( 2. That faculty by which sensations, impressions, and ideas are stored and recalled. ( 3. Complex mental function having four distinct phases: a. memorizing or learning b. retention, c. recall d. recognition. Clinically, it is usually subdivided into immediate, recent, and remote memory. The area of cognitive psychology that studies memory processes; he taught a graduate course on learning and memory.The cognitive processes whereby past experience is remembered; he can do it from memory; he enjoyed remembering his father.The power of retaining and recalling past experience; he had a good memory when he was younger.The recollection of past events and experiences stored from learning and instinctive behaviour. ( 3. Persistent modification of behavior resulting from experience. (The American Heritage® Medical Dictionary) 4. The capacity of a material, such as plastic or metal, to return to a previous shape after deformation. (The American Heritage® Medical Dictionary) 5. The capability of the immune system to produce a specific secondary response to an antigen it has previously encountered. (The American Heritage® Medical Dictionary) 6. A general term for a device that stores data in binary code on electronic or magnetic media in computers. (Mosby’s Dental Dictionary, 2nd edition) Word origin: From Latin memoria “memory, remembrance, faculty of remembering,” noun of quality from memor “mindful,...

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