: a crystalline nonessential amino acid C3H7NO3 that occurs as a residue in many proteins
Examples of serine in a Sentence
Recent Examples on the Web
Wellness and supplement ingredients Further interest in serine as an ingredient reflects a focus on cognitive health and stress management for consumers, as well as a desire for mental well-being.
—
Vogue Business Team,
Vogue,
7 Nov. 2025
This morning, included in my breakfast was serine, octanoic acid, E160c, phenylacetaldehyde, hepta-2-enal and lots of other chemicals.
—
Sheah Rarback,
Miami Herald,
6 Nov. 2025
One study found that the topical application of a 15% azelaic acid gel on rosacea-prone skin reduced what is known as the serine protease activity that causes inflammation.
—
Lottie Winter,
Glamour,
6 Oct. 2025
New research led by Rockefeller University, New York, has explored how a non-essential amino acid, serine, influences the behavior of HFSCs and discovered that when serine levels are low, the cells prioritize wound healing over hair growth.
—
New Atlas,
19 July 2025
But their relative levels remained consistent before and after the chunks were plunged into the asteroid simulation—there was always more glycine than serine, and more serine than alanine.
—
WIRED,
31 Jan. 2023
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Vogue Business Team,
Vogue,
7 Nov. 2025
This morning, included in my breakfast was serine, octanoic acid, E160c, phenylacetaldehyde, hepta-2-enal and lots of other chemicals.
—
Sheah Rarback,
Miami Herald,
6 Nov. 2025
One study found that the topical application of a 15% azelaic acid gel on rosacea-prone skin reduced what is known as the serine protease activity that causes inflammation.
—
Lottie Winter,
Glamour,
6 Oct. 2025
New research led by Rockefeller University, New York, has explored how a non-essential amino acid, serine, influences the behavior of HFSCs and discovered that when serine levels are low, the cells prioritize wound healing over hair growth.
—
New Atlas,
19 July 2025
But their relative levels remained consistent before and after the chunks were plunged into the asteroid simulation—there was always more glycine than serine, and more serine than alanine.
—
WIRED,
31 Jan. 2023
Cite this Entry
“Serine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/serine. Accessed 5 Jul. 2026.
Copy CitationMedical Definition
serine
noun
ser·ine
ˈse(ə)r-ˌēn 
: a nonessential amino acid C3H7NO3 that occurs especially as a structural part of many proteins and phosphatidylethanolamines and is a precursor of glycine
—abbreviation Ser
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