Kevin
March 7, 2021
Common Questions
Do you know what LRT means? Maybe this abbreviation stumped you on a crossword puzzle. This guide will provide you with all of the info you need on the acronym LRT, including its various definitions, usage, examples, and more!
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According to Urban Dictionary, the trending slang term LRT stands for “last retweet” on social media. This is used on the website Twitter. This acronym is used to show one’s response or opinion on something they just retweeted. While this was more popular at the beginning of the site’s creation, it has since become nearly obsolete with the advent of retweeting and adding a comment.
According to Dictionary, when it comes to transit systems, LRT stands for “light rail transit.” According to Twin Cities, an LRT line runs on electricity. The wire system that runs above the train is called an overhead catenary system. These railway systems are used in a variety of large cities, like the metro systems in Los Angeles and San Francisco, and other railway systems in cities across the United States and the rest of the world. Many of these different tracks intersect within cities, and have complex right-of-way systems to prevent accidents.
According to Thesaurus, there are other synonyms one can use in place of LRT. These include, busline, mass transit, light rail, rail rapid transit, railway, subway, and urban transportation service.
According to Merriam-Webster Unabridged Dictionary, in the medical field LRT stands for “lower respiratory tract.” The lower respiratory tract includes the trachea, bronchi, and the alveoli which make up the lungs. Each of these different structures take the oxygen that the upper respiratory pulled in, absorb it, and release carbon dioxide back out through the mouth or nose. The thoracic cage, or rib cage, and the diaphragm both support and protect the lower respiratory tract.
Visible Body tells us what each of these different parts of the lower respiratory tract are functional for. The trachea is also known as the windpipe. This is the main airway for oxygen to get into our lungs. The trachea is shaped like a cylindrical tube. It is less than an inch in diameter and is covered in rings. These rings prevent the trachea from collapsing. Once the trachea reaches behind the sternum, the trachea branches off into smaller tubes called the bronchi. Upon exhalation, deoxygenated air passes back up through the trachea and out through the mouth or nose.
The tubes that branch off from the trachea are called the bronchi. These get progressively smalley until they reach the lungs, which they deliver oxygenated air to. When we exhale, the deoxygenated, carbon-dioxide filled air goes abc out of the bronchi and back up the trachea. When we exercise, the bronchi expand to alloy for increased airflow, while allergic reactions do the opposite.
Then the air reached our lungs, which are protected inside the ribcage. One air is in the lungs, the oxygen is absorbed into our bloodstream, massing through millions of tiny sacs called alveoli into the capillaries. The alveoli exchange gases between the bloodstream and the air. Then the carbon dioxide travels in the opposite way, back from the capillaries, to the alveoli, back out the bronchi and trachea.
The diaphragm is the muscle that we use to breathe. It sits at the bottom of the thoracic cavity. When we inhale, it gets smaller and moves backward, which allows the volume of the lungs to increase. This is why our abdomen pushes out when we take a deep breath. The reverse happens when we exhale. This explains why our breathing feels stunted when we get the hiccups.
According to The Free Dictionary, LRT also has a variety of other definitions. One should be careful when using any acronym that has multiple meanings, because the intended meaning may not come across. One should exercise extra caution when using one of these less-common meanings, as one will likely assume the user means with the medical, transit, or social media definitions.
Since the acronym LRT has so many different meanings, one should be careful not to confuse it with an acronym that looks similar to it. These are listed below.
Overall, the acronym LRT can stand for a great many different things in the medical field (lower respiratory tract), transit field (light rail transit), and on social media (last retweet.) One should ensure that they are clear about the meaning of the acronym.
