lipid

noun

lip·​id ˈli-pəd How to pronounce lipid (audio)
variants or less commonly lipide
: any of various substances that are soluble in nonpolar organic solvents (such as chloroform and ether), that are usually insoluble in water, that with proteins and carbohydrates constitute the principal structural components of living cells, and that include fats, waxes, phosphatides, cerebrosides, and related and derived compounds
lipidic adjective

Examples of lipid in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Surrounding that and protected by an outer shell is the cytoplasm, a frothy liquid of protein-synthesizing ribosomes, energy-producing mitochondria, energy-storing lipids, and the like. Literary Hub, 28 Oct. 2025 Everlywell, one of the most popular DTC brands, offers a variety of at-home lab tests, including a food sensitivity test, cholesterol and lipid panel, thyroid test, a 5-panel STD test, and more. Sara Braun, Sacbee.com, 17 Oct. 2025 University of Utah researchers found that triple-negative breast cancer (TNBC)—an aggressive type of invasive breast cancer—is fueled by lipids and that these fatty acids are a key feature of obesity that promote tumor growth. Hannah Millington, MSNBC Newsweek, 16 Oct. 2025 The team employed a novel method using lipid nanoparticles (LNPs) to deliver messenger RNA (mRNA) directly to the testes. Mrigakshi Dixit, Interesting Engineering, 13 Oct. 2025 See All Example Sentences for lipid

Word History

Etymology

International Scientific Vocabulary

First Known Use

1912, in the meaning defined above

Time Traveler
The first known use of lipid was in 1912

Cite this Entry

“Lipid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/lipid. Accessed 4 Nov. 2025.

Kids Definition

lipid

noun
lip·​id ˈlip-əd How to pronounce lipid (audio)
: any of various substances (as fats and waxes) that with proteins and carbohydrates make up the principal structural parts of living cells

Medical Definition

lipid

noun
lip·​id ˈlip-əd How to pronounce lipid (audio)
variants also lipide
: any of various substances that are soluble in nonpolar organic solvents (as chloroform and ether), that with proteins and carbohydrates constitute the principal structural components of living cells, and that include fats, waxes, phospholipids, cerebrosides, and related and derived compounds

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