Definition

1. Noun:
   • A cell that functions in the breakdown and resorption of bone tissue: An osteoclast is a large, multinucleated cell that breaks down bone matrix, a process essential for bone remodeling, repair, and calcium homeostasis.

Usage Examples

• Noun:
  • Osteoclast activity increases when calcium levels in the blood are low.
  • The balance between osteoblast formation and osteoclast activity determines bone density.
  • Certain diseases can cause excessive osteoclast function, leading to weakened bones.

Advanced Usage

• "Osteoclast differentiation": The process by which precursor cells develop into mature, functional osteoclasts.
  • The hormone RANKL is a key regulator of osteoclast differentiation.
• "Osteoclast-mediated resorption": The specific breakdown of bone tissue carried out by osteoclasts.
  • The pit on the bone surface is evidence of osteoclast-mediated resorption.

Variants and Related Words

• Osteoclastic (adj): Pertaining to or characteristic of osteoclasts.
  • The osteoclastic resorption process is highly regulated.
• Osteolysis (n): The pathological destruction or dissolution of bone tissue, often involving osteoclasts.
  • The radiographic images showed signs of osteolysis around the implant.

Synonyms

• Bone-resorbing cell: A descriptive synonym emphasizing the cell's primary function.

Related Concepts (Not Phrasal Verbs or Idioms)

• Bone remodeling: The continuous cycle of bone resorption by osteoclasts and bone formation by osteoblasts.
• Resorption pit (Howship's lacuna): The depression or cavity on a bone surface created by an osteoclast during its resorptive activity.

Noun

1. cell that functions in the breakdown and resorption of bone tissue