polysaccharide

noun
poly·​sac·​cha·​ride | \ ˌpä-lē-ˈsa-kə-ˌrīd How to pronounce polysaccharide (audio) \

Definition of polysaccharide

: a carbohydrate that can be decomposed by hydrolysis into two or more molecules of monosaccharides especially : one (such as cellulose, starch, or glycogen) containing many monosaccharide units and marked by complexity

Examples of polysaccharide in a Sentence

Recent Examples on the Web Risk for the coronavirus was reduced in those who had a pneumococcal polysaccharide or influenza vaccine, or were on melatonin, paroxetine, or carvedilol, according to Clinic research. Julie Washington, cleveland, "Cleveland Clinic develops coronavirus prediction model," 16 June 2020 The risk calculator study found that patients who received the pneumococcal polysaccharide vaccine (PPSV23) and flu vaccine were less likely to test positive for COVID-19 than those who didn’t receive the vaccinations. Julie Washington, cleveland, "Cleveland Clinic develops coronavirus prediction model," 16 June 2020 They are generally made of long strings of those simple sugars, called polysaccharides (i.e. many sugars). Carolyn L. Todd, SELF, "Here's What Carbs Actually Do in Your Body," 23 May 2019 That discovery, known as conjugation, involves attaching proteins to the polysaccharides — complex sugars — on the bacterium’s outer capsule. BostonGlobe.com, "NEW YORK — Dr. John B. Robbins, a pioneer in vaccinology and one of the inventors of the first effective defense against a form of meningitis that once killed more than a thousand infants a day worldwide, died Nov. 27 at his home in Manhattan. He was 86.," 19 Dec. 2019 The problem was that the vaccine, known as a polysaccharide because it was based on sugar molecules that form the outer capsule of the bacteria, was not easily visible to infant immune systems. Emily Langer, Washington Post, "John Robbins, pioneer of a meningitis vaccine, dies at 86," 20 Dec. 2019 The next generation of vaccines, made of just the surface polysaccharides, were safer. BostonGlobe.com, "NEW YORK — Dr. John B. Robbins, a pioneer in vaccinology and one of the inventors of the first effective defense against a form of meningitis that once killed more than a thousand infants a day worldwide, died Nov. 27 at his home in Manhattan. He was 86.," 19 Dec. 2019 There are two types of pneumococcal vaccines: pneumococcal conjugate vaccine (PCV13), which protects against 13 types of pneumococcal bacteria, and pneumococcal polysaccharide (PPSV23), which protects against 23 types, the CDC says. Patia Braithwaite, SELF, "Here Are All the Vaccines You Actually Need as an Adult," 26 Aug. 2019 The scales of chitin (a polysaccharide common to insects) are arranged like roof tiles. Jennifer Ouellette, Ars Technica, "“Rainbow” weevil could hold the secret to generating nature’s colors in the lab," 23 Sep. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'polysaccharide.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of polysaccharide

1892, in the meaning defined above

History and Etymology for polysaccharide

International Scientific Vocabulary

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Time Traveler for polysaccharide

Time Traveler

The first known use of polysaccharide was in 1892

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Last Updated

17 Jul 2020

Cite this Entry

“Polysaccharide.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/polysaccharide. Accessed 7 Aug. 2020.

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More Definitions for polysaccharide

polysaccharide

noun
poly·​sac·​cha·​ride | \ -ˈsak-ə-ˌrīd How to pronounce polysaccharide (audio) \

Medical Definition of polysaccharide

: a carbohydrate that can be decomposed by hydrolysis into two or more molecules of monosaccharides especially : one (as cellulose, starch, or glycogen) containing many monosaccharide units and marked by complexity

called also glycan

More from Merriam-Webster on polysaccharide

Britannica.com: Encyclopedia article about polysaccharide

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