Definition

1. Noun:
   • A sesamoid bone is a small, round, or oval-shaped bone that is embedded within a tendon. It is typically found where a tendon passes over a joint, such as the knee or the foot. Its primary function is to protect the tendon and to improve its mechanical efficiency by acting as a pulley.

Usage

• The term sesamoid bone is a specific anatomical term used in medicine, biology, and related fields.
• It is a countable noun (e.g., , ).
• It is often used to describe a specific anatomical feature, most commonly the patella (kneecap) and the bones under the ball of the foot.

Examples

• Noun:
  • The patella, or kneecap, is the largest sesamoid bone in the human body.
  • Pain in the ball of the foot can sometimes be caused by inflammation of a sesamoid bone.
  • Radiologists identified a fracture in one of the sesamoid bones.

Advanced Usage

• "Sesamoiditis": This is a medical condition referring to the inflammation of a sesamoid bone and the surrounding tendon structures. It is a common cause of pain in the forefoot.
  • The runner was diagnosed with sesamoiditis and advised to rest.

Variants and Related Words

• Sesamoid (adjective): Describing something as having the shape or nature of a sesame seed, or relating to a sesamoid bone.
  • The surgeon noted the sesamoid cartilage.
• Patella (noun): The specific anatomical name for the kneecap, which is a sesamoid bone.
• Fabellae (noun, plural): Small sesamoid bones sometimes found in the tendon of the lateral head of the gastrocnemius muscle, behind the knee.

Synonyms

• Ossicle: A general term for a small bone, which can include sesamoid bones.
• Accessory bone: A broader term for an extra bone not typically present in all individuals; many sesamoid bones are considered accessory bones.

Related Phrases / Collocations

• Sesamoid bone fracture: A break in a sesamoid bone.
• Bipartite sesamoid: A sesamoid bone that is naturally divided into two parts, which can sometimes be mistaken for a fracture.

Noun

1. any of several small round bones formed in a tendon where it passes over a joint