cell line A lineage or pedigree of cells that are related through asexual division. The cell line of an organ traces the course taken by cell division from a single-celled zygote to the formation of that particular multicellular organ. A cell line may also be derived in the laboratory from a primary culture.

cell line A lineage (or pedigree) of cells that are related through asexual division. A cell line may be derived in the laboratory from a primary cell culture.