Definition

1. Noun:
   • A cranial bone: The ethmoid is one of the eight bones that form the human cranium (skull). It is a small, delicate, and complex bone located between the eyes.
   • A structure in the skull: The ethmoid bone is characterized by being porous and filled with air spaces (sinuses). It contributes to the structure of the eye sockets (orbits) and the nasal cavity, forming part of the nasal septum and the roof of the nose.

Examples of Usage

• Noun:
  • A fracture of the ethmoid can affect both vision and smell.
  • The surgeon carefully navigated around the delicate ethmoid during the procedure.
  • The ethmoid is a key component in separating the nasal cavity from the brain.

Advanced Usage

• "Ethmoidal" (adjective): Pertaining to the ethmoid bone.
  • The ethmoidal sinuses are small air cells within the ethmoid bone.
  • Ethmoidal fractures require careful evaluation.

Variants and Related Words

• Ethmoid bone: The full anatomical term for the structure.
  • The cribriform plate is a part of the ethmoid bone.
• Ethmoidectomy (noun): A surgical procedure to remove part of the ethmoid bone, often to treat sinus disease.
  • The patient underwent an ethmoidectomy to improve sinus drainage.

Synonyms

• Ethmoid bone: The precise anatomical synonym.
• Cribriform plate: Refers to a specific horizontal part of the ethmoid bone that allows olfactory nerves to pass.

Notes on Meaning

• The term "ethmoid" is almost exclusively used in medical, anatomical, and biological contexts. In everyday conversation, it is typically referred to as the "ethmoid bone".
• Its primary functions are structural (forming parts of the orbit and nasal cavity) and functional (housing sinuses and providing a passage for the olfactory nerves responsible for the sense of smell).

Noun

1. one of the eight bones of the cranium; a small bone filled with air spaces that forms part of the eye sockets and the nasal cavity