osmolality

noun

os·​mo·​lal·​i·​ty ˌäz-mō-ˈla-lə-tē How to pronounce osmolality (audio)
ˌäs-
plural osmolalities
: the concentration of an osmotic solution especially when measured in osmols or milliosmols per 1000 grams of solvent
osmolal adjective

Examples of osmolality in a Sentence

Recent Examples on the Web
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This led her to study the vaginal microbiome and develop Bio-Match® technology, formulations designed to mimic the body’s natural balance with osmolality and pH levels supportive of healthy flora. Tanya Akim, Forbes.com, 11 June 2026 Researchers also measured urine color and osmolality (for water concentration) and levels of plasma copeptin, a stable by-product of the hormone vasopressin. New Atlas, 21 Aug. 2025 Yes, because of the osmolality of the carbs, whey, protein absorption, everything like that. Greg Presto, Men's Health, 6 May 2022

Word History

Etymology

osmol + -al entry 1 + -ity

First Known Use

circa 1944, in the meaning defined above

Time Traveler
The first known use of osmolality was circa 1944

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Cite this Entry

“Osmolality.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/osmolality. Accessed 6 Jul. 2026.

Medical Definition

osmolality

noun
os·​mo·​lal·​i·​ty ˌäz-mō-ˈlal-ət-ē, ˌäs- How to pronounce osmolality (audio)
plural osmolalities
: the concentration of an osmotic solution especially when measured in osmols or milliosmols per 1000 grams of solvent
osmolal adjective

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