plas·ma (pl?z?m?)n. also plasm (pl?z??m)1. a. The clear, yellowish fluid portion of blood, lymph, or intramuscular fluid in which cells are suspended. It differs from serum in that it contains fibrin and other soluble clotting elements.b. Blood plasma, especially when sterilized and depleted of cells for transfusion.2. Protoplasm or cytoplasm.3. The fluid portion of milk from which the curd has been separated by coagulation; whey.4. Physics An electrically neutral, highly ionized phase of matter composed of ions, electrons, and neutral particles. It is distinct from solids, liquids, and gases.adj. Of or relating to a flat-panel display used in televisions, made up of an array of tiny cells each containing a gaseous mixture of xenon and neon that is changed into a plasma state to illuminate a phosphor coating on the inside of the cell.[New Latin, from Late Latin, image, figure, from Greek, from plassein, to mold; see pel?- in Indo-European roots.]plas·mat?ic (pl?z-m?t??k), plas?mic (-m?k) adj.American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.plasma (?plæzm?) or plasmn1. (Physiology) the clear yellowish fluid portion of blood or lymph in which the red blood cells, white blood cells, and platelets are suspended2. (Physiology) short for blood plasma3. (Biology) a former name for protoplasm, cytoplasm4. (Nuclear Physics) physics a. a hot ionized material consisting of nuclei and electrons. It is sometimes regarded as a fourth state of matter and is the material present in the sun, most stars, and fusion reactorsb. the ionized gas in an electric discharge or spark, containing positive ions and electrons and a small number of negative ions together with un-ionized material5. (Minerals) a green slightly translucent variety of chalcedony, used as a gemstone6. (Cookery) a less common term for whey[C18: from Late Latin: something moulded, from Greek, from plassein to mould] plasmatic, ?plasmic adjCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014plas?ma (?plæz m?) n. 1. the fluid part of blood or lymph, as distinguished from the cellular components. 2. protoplasm. 3. a green, faintly translucent chalcedony. 4. a highly ionized gas containing an approximately equal number of positive ions and electrons. Also, plasm (?plæz ?m) (for defs. 1-3).[1705?15;