Cell

Definition

The basic structural, functional, and biological unit of all living organisms, often referred to as the 'building block of life'.

Etymology

From Latin 'cella', meaning 'small room'.

Example

The epithelial cells in an insect's exoskeleton serve as a protective barrier.

Synonyms

• Biological unit

Related Terms

• Tissue
• Organ
• Organism
• Protoplasm
• Nucleus

Usage Notes

Cells can be highly specialized and functionally diverse, ranging from simple prokaryotic cells to complex eukaryotic cells.