cell

noun:the smallest structural and functional unit of an organism, typically microscopic
- The human body is composed of trillions of cells.
noun:a small, usually windowless room in a prison where a person lives or is confined
- The inmate spent three months in a solitary cell with only a thin mattress and a small desk.
noun:one of the individual power units that together make up a battery, capable of storing and delivering electrical energy
- When the car's battery died, the mechanic replaced the faulty cell to restore its charge.
noun:a single unit in a spreadsheet or table where data, numbers, or formulas can be entered and manipulated
- She typed the monthly expenses into the appropriate cells of the Excel worksheet.
noun:informal term for a mobile telephone, especially a cellular phone
- He couldn't answer the call because his cell battery died during the hike.