mindmap root((POLY)) polyp 1、 A sea invertebrate that has a mouth opening at one end surrounded by stinging tentacles.
2、 A growth projecting from a mucous membrane, as on the colon or vocal cords.
🌱She had had a polyp removed from her throat, and for two weeks afterward she could only whisper. 🌳This term comes from polypous, a Greek word for "octopus," which meant literally "many-footed." To the untrained eye, the invertebrate known as the polyp may likewise appear to be many-footed, though it never walks anywhere since its "feet" are tentacles, used for stinging tiny organisms which the polyp then devours. The types of tumor known as polyps got their name because some seem to be attached to the surface by branching "foot"-like roots, even though most do not. Polyps of the nose or vocal cords are usually only inconvenient, causing breathing difficulty or hoarseness, and can be removed easily; however, polyps in the intestines can sometimes turn cancerous. polyglot 1、 One who can speak or write several languages.
2、 Having or using several languages.
🌱As trade between countries increases, there is more need for polyglots who can act as negotiators. 🌳Polyglot contains the root glot, meaning "language." It is used both as a noun and as an adjective. Thus, we could say that an international airport is bound to be polyglot, with people from all over the world speaking their native languages. One of history's more interesting polyglots was the Holy Roman Emperor Charles V, who claimed that he addressed his horse only in German, conversed with women in Italian and with men in French, but reserved Spanish （his original language） for his talks with God. polymer A chemical compound formed by a reaction in which two or more molecules combine to form larger molecules with repeating structural units.
🌱Nylon, a polymer commercially introduced in 1938, can be spun and woven into fabrics or cast as tough, elastic blocks. 🌳There are many natural polymers, including shellac, cellulose, and rubber. But synthetic polymers only came into being around 1870 with Celluloid, known especially for its use in photographic film. After many decades of development, the polymeric compounds now include polypropylene, used in milk crates, luggage, and hinges; polyurethane, used in paints, adhesives, molded items, rubbers, and foams; and polyvinyl chloride （PVC）, used to make pipes that won't rust. And let's not forget polyester, which gave us a lot of uncool clothing in the 1970s but whose strength and resistance to corrosion have ensured that it remains an extremely useful material for all kinds of goods. polygraph An instrument for recording changes in several bodily functions （such as blood pressure and rate of breathing） at the same time; lie detector.
🌱My brother-in-law is completely law-abiding, but he's such a nervous type that he's failed two polygraph tests at job interviews. 🌳With its graph- root （See GRAPH,） polygraph indicates that it writes out several different results. A polygraph's output consists of a set of squiggly lines on a computer screen, each indicating one function being tested. The functions most commonly measured are blood pressure, breathing rate, pulse, and perspiration, all of which tend to increase when you lie. Polygraphs have been in use since 1924, and have gotten more sensitive over the years, though many experts still believe that they're unreliable and that a prepared liar can fool the machine. They're used not only for law enforcement but perhaps more often by employers—often the police department itself!—who don't want to hire someone who has broken the law in the past but won't admit to it.