stem cell

noun

: an unspecialized cell that gives rise to differentiated cells
hematopoietic stem cells in bone marrow

Examples of stem cell in a Sentence

Recent Examples on the Web
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With the expansion of regenerative and longevity-focused therapies, including stem cell, peptide, and photobiomodulation modalities, Melissa continues to lead with discernment. William Jones, USA Today, 30 Mar. 2026 In addition, microfluidic chips can be used to deliver specific gradients of morphogens and nutrients to stem cell aggregates, thus controlling symmetry-breaking. Srishti Gupta, Interesting Engineering, 28 Mar. 2026 The drug, which is designed to stimulate the activity of a metabolic enzyme called LDH in hair-follicle stem cells, still has further, bigger trials and safety tests to get through before it can be approved by regulators. The Week Uk, TheWeek, 27 Mar. 2026 The stem cells were then transferred to Rocket Pharmaceuticals' laboratory. Kerry Breen, CBS News, 27 Mar. 2026 See All Example Sentences for stem cell

Word History

First Known Use

1896, in the meaning defined above

Time Traveler
The first known use of stem cell was in 1896

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Cite this Entry

“Stem cell.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/stem%20cell. Accessed 2 Apr. 2026.

Kids Definition

stem cell

noun
: a simple cell that can become a cell (as a blood cell or skin cell) with a special function

Medical Definition

stem cell

noun
: an unspecialized cell capable of perpetuating itself through cell division and having the potential to give rise to differentiated cells with specialized functions
Embryonic stem cells are pluripotent cells derived from the inner cell mass of the blastocyst stage of the embryo.Carrie J. Merkle, in Essentials of Pathophysiology
… picture the bone marrow as a blood cell factory that takes a single type of precursor cell, or stem cell, and modifies it in various ways to produce all the cells that circulate in the blood.Gina Kolata, Discover
Recent observations are providing increasing evidence for the concept that adult stem cells are part of a natural system for tissue repair.Darwin J. Prockop, in Essentials of Stem Cell Biology

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