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Isolate

/ˈīsəˌlāt/ Verb 1. To set apart or cut off from others. (wiktionary.org) 2. To place in quarantine or isolation. (wiktionary.org) 3. (Chemistry) To separate a substance in pure form from a mixture. (wiktionary.org) 4. To insulate, or make free of external influence. (wiktionary.org) 5. (Microbiology) To separate a pure strain of bacteria etc. from a mixed culture. (wiktionary.org) 6. To insulate an electrical component from a source of electricity. (wiktionary.org)   Adjective 1. Solitary; alone. (thefreedictionary.com)   Noun 1. A person, thing, or group that has been isolated, as by geographic, ecologic, or social barriers. (thefreedictionary.com) 2. (Biology) A population of bacteria or other cells that has been isolated. (thefreedictionary.com) 3. (Linguistics) A language isolate. (thefreedictionary.com)   Word origin: From French isolé “isolated”. The French word is from Italian isolato, from Latin insulatus “made into an island,” from insula...

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Isometric

/ˌīsəˈmetrik/ Adjective 1. Of, or exhibiting equality in dimensions. (wiktionary.org) 2. Of, or being a geometric system of three equal axes lying at right angles to each other (especially in crystallography). (wiktionary.org) 3. (Physiology) Of or involving muscular contraction against resistance in which the length of the muscle remains the same. (wiktionary.org) 4. (Physics, of a thermodynamic process) Taking place at constant volume because of being confined by rigid boundaries. (wiktionary.org) 5. (In technical or architectural drawing) Incorporating a method of showing projection or perspective in which the three principal dimensions are represented by three axes 120° apart. (Google Dictionary) 6. (Of a transformation) Without change of shape or size. (Google Dictionary) 7. Of, relating to, or characterized by equality of measure; especially relating to or being a crystallographic system characterized by three equal axes at right angles. (merriam-webster.com) Word origin: Coined from Greek isos “equal” + metron...

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Isotope

/ˈīsəˌtōp/ Noun, pl. isotopes 1. Variants of a particular chemical element: while all isotopes of a given element share the same number of protons and electrons, each isotope differs from the others in its number of neutrons. (wikipedia.org) 2. (Physics) Any of two or more forms of an element where the atoms have the same number of protons, but a different number of neutrons within their nuclei. As a consequence, atoms for the same isotope will have the same atomic number but a different mass number (atomic weight). (wiktionary.org) 3. (Radiobiology) One of several nuclides having the same number of protons in their nuclei and hence having the same atomic number, but differing in the number of neutrons and therefore, in the mass number. Almost identical chemical properties exist between isotopes of a particular element. The use of this term as a synonym for nuclide is to be discouraged. (biology-online.org) 4. One of two or more atoms with the same atomic number but with different numbers of neutrons. one of two or more atoms with the same atomic number but with different numbers of neutrons Word origin: Introduced by British chemist Frederick Soddy (1877-1956) on suggestion of Margaret Todd, from Greek isos “equal to, the same as” + topos...

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Isthmus

/ˈisməs/ Noun, pl. isthmi, isthmuses 1. (Anatomy) Any such narrow part connecting two larger structures. (wiktionary.org) 2. A narrow organ, passage, or piece of tissue connecting two larger parts. (Google Dictionary) 3. (Geography) A neck or narrow slip of land by which two continents are connected, or by which a peninsula is united to the mainland; as, the isthmus of Panama; the isthmus of Suez, etc. Isthmus of the fauces. (biology-online.org) Word origin: From Greek isthmos “narrow passage, narrow neck of land,” especially that of Corinth, of unknown origin, perhaps from eimi “to go” + suffix –thmo (cf. ithma “a step,...

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Isthmus of the fauces

A part of the oropharynx directly behind the mouth cavity, bounded superiorly by the soft palate, laterally by the palatoglossal arches, and inferiorly by the tongue. The fauces are regarded as the two pillars, formed by the palatoglossus and the palatopharyngeus muscle, respectively, and covered with mucous membrane. Syn: oropharyngeal isthmus Word origin: 1550s, from Latin isthmus, from Greek isthmos “narrow passage, narrow neck of land,” especially that of Corinth, of unknown origin, perhaps from eimi “to go” + suffix –thmo (cf. ithma “a step,...

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