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Plankton

/ˈplaNGktən/ 1. Marine and freshwater organisms that, because they are nonmotile or because they are too small or too weak to swim against the current, exist in a drifting, floating state. The term plankton is a collective name for all such organisms and includes certain algae, bacteria, protozoans, crustaceans, mollusks, and coelenterates, as well as representatives from almost every other phylum of animals. Plankton is distinguished from nekton, which is composed of strong-swimming animals, and from benthos, which includes sessile, creeping, and burrowing organisms on the seafloor. (global.britannica.com) 2. The small and microscopic organisms drifting or floating in the sea or fresh water, consisting chiefly of diatoms, protozoans, small crustaceans, and the eggs and larval stages of larger animals. Many animals are adapted to feed on plankton, esp. by filtering the water. (Google Dictionary) 3. The passively floating or weakly swimming usually minute animal and plant life of a body of water. (merriam-webster.com) 4. Any organisms that live in the water column and are incapable of swimming against a current. They provide a crucial source of food to many large aquatic organisms, such as fish and whales. (wikipedia.org) 5. A generic term for all the organisms that float in the sea. A single organism is known as a plankter. (wiktionary.org) Word origin: From Greek plankton, neuter of planktos “wandering, drifting,” verbal adjective from plazesthai “to wander, drift,” from plazein...

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Plant

Noun, pl. plants 1. Living organisms of the kingdom Plantae including such multicellular groups as flowering plants, conifers, ferns and mosses, as well as, depending on definition, the green algae, but not red or brown seaweeds like kelp, nor fungi or bacteria. (wikipedia.com) 2. An organism that is not an animal, especially an organism capable of photosynthesis. Typically a small or herbaceous organism of this kind, rather than a tree. (wiktionary.com) 3. An organism of the kingdom Plantae; now specifically, a living organism of the Embryophyta (land plants) or of the Chlorophyta (green algae), a eukaryote that includes double-membraned chloroplasts in its cells containing chlorophyll a and b, or any organism closely related to such an organism. (wiktionary.com) 4. Now specifically, a multicellular eukaryote that includes chloroplasts in its cells, which have a cell wall. (wiktionary.com) 5. A living organism lacking the power of locomotion. (dictionary.com)   Verb 1. Place (a seed, bulb, or plant) in the ground so that it can grow. (dictionary.com) 2. Place a seed, bulb, or plant in (a place) to grow. (Google Dictionary)   Word origin: From Middle English planten, from Old English plantian (to plant), from Latin plantare, later influenced by Old French...

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Plasma

/ˈplazmə/ Noun (Physics) 1. An electrically conducting medium in which there are roughly equal numbers of positively and negatively charged particles, produced when the atoms in a gas become ionized. It is sometimes referred to as the fourth state of matter, distinct from the solid, liquid, and gaseous states. (global.britannica.com) 2. A collection of charged particles (as in the atmospheres of stars or in a metal) containing about equal numbers of positive ions and electrons and exhibiting some properties of a gas but differing from a gas in being a good conductor of electricity and in being affected by a magnetic field. (merriam-webster.com) (Hematology) 1. A clear component of blood or lymph containing fibrin. (wiktionary.org) 2. Blood plasma, free of suspended cells, used in transfusions (wiktionary.org); fluid through which cellular components of blood, lymph, or intramuscular fluid are suspended. (biology-online.org) (Mineralogy) 1. A variety of green quartz, used in ancient times for making engraved ornaments. (wiktionary.org) (Medicine, dated) 1. A mixture of starch and glycerin, used as a substitute for ointments. (wiktionary.org) 2. Acellular, sterilized blood plasma that is used for transfusion. (biology-online.org) (Computer graphics, demoscene) 1. A visual effect in which cycles of changing colours are warped in various ways to give the illusion of liquid organic movement. (wiktionary.org) (General) 1. A display (as a television screen) consisting of discrete cells of plasma sandwiched between two layers of...

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Plastron

Noun 1. The nearly flat part of the shell structure of a turtle, what one would call the belly or ventral surface of the shell. It also includes within its structure the anterior and posterior bride struts and the bridge of the shell. (wikipedia.org) 2. The ventral part of the shell of a tortoise or turtle consisting typically of nine symmetrically placed bones overlaid by horny plates. (merriam-webster.com) 3. The part of a turtle’s shell forming its underside. (wordnetweb.princeton.edu) Word origin: From Middle French plastron “breastplate,” from Italian piastrone, augmentative of piastra “breastplate, thin metal...

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