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nephron
This term describes the microscopic filtering unit of the kidney. It carries a clinical and biological connotation, typically appearing in medical textbooks, anatomy lectures, or physiological research rather than in casual conversation.
As a countable noun, it follows standard English pluralization rules. It refers to a specific physical structure, and its usage is strictly limited to the biological context of renal function.
Meanings
The structural and functional unit of the kidney, consisting of a glomerulus and a tubule, responsible for filtering blood and forming urine.
Each human kidney contains approximately one million nephrons.