What does cellularity mean?
Cellularity is a specialized noun denoting the degree to which a tissue, growth, or other biological material is composed of cells. Its most common use is in pathology, where pathologists describe how densely cells are packed within a tumour or lesion. A growth with high cellularity contains many cells in the tissue examined, while low cellularity indicates fewer cells and potentially more non-cellular material. The term is also used more broadly in biology to characterize the cellular composition of tissues or organisms. It should not be confused with the mere presence of cells: cellularity often concerns their number, density, and proportion rather than simply whether cells are present. In medical discussion, the word is concise but technical, and it is most often encountered in diagnostic pathology, histopathology, and biological research.
nounCellularity is the degree to which a tissue, growth, or other substance is composed of cells, especially the density of cells in a specimen. In pathology, it refers particularly to how many cells occupy a tumour or lesion.
- The degree or density of cells in a tissue, lesion, tumour, or other substance.
- The state or quality of being composed or organized in cells.
"The pathologist noted that the tumour's unusually high cellularity was an important diagnostic feature."
"The pathologist noted that the tumour's unusually high cellularity was an important diagnostic feature."
"The study compared the cellularity of healthy and damaged tissue over time."
The plural is grammatically possible but uncommon because cellularity is usually treated as an uncountable noun.
"The pathologist compared the cellularities of the two tissue samples."
In pathology, cellularity is a visual census: how many cells crowd a tissue can be crucial to interpreting a growth.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does cellularity come from?
Cellularity was formed in English by adding the suffix "-ity" to "cellular." The root "cell" ultimately comes from Latin, where cellula was a diminutive of cella and referred to a small room or compartment. As biology and pathology developed vocabulary for describing the organization and composition of tissues, cellularity came to denote the condition or degree of being cellular.
How cellularity is actually used
Cellularity is chiefly a technical term used in biology and, especially, pathology. It is normally used as an uncountable noun, as in "high cellularity" or "the cellularity of the lesion."