Definition

Noun: A hollow, air-filled space located within the frontal bone of the skull, above the eyes and behind the forehead. Humans typically have a pair of these sinuses, one on each side.

Usage

The term "frontal sinus" is used in medical, anatomical, and biological contexts to describe this specific anatomical structure. * The frontal sinus helps to lighten the weight of the skull and resonate the voice. * An infection of the frontal sinus can cause severe headache and pressure above the eyes. * The size and shape of the frontal sinus can vary significantly from person to person.

Advanced Usage

• Frontal sinusitis: This is the medical term for inflammation or infection of the frontal sinus.
  • The patient was diagnosed with acute frontal sinusitis.

Variants and Related Words

• Sinus: A general term for a cavity or hollow space. The frontal sinus is one of several paranasal sinuses.
• Paranasal sinuses: The collective term for the four pairs of sinuses connected to the nasal cavity, which include the frontal, maxillary, ethmoid, and sphenoid sinuses.

Synonyms

• Frontal air sinus: An alternative, less common name.
• Sinus frontalis: The Latin anatomical term.

Related Phrases

• Sinus drainage: Refers to the natural process of mucus clearing from the sinus cavities.
  • Congestion can block normal frontal sinus drainage.
• Sinus cavity: A general phrase for any of the paranasal sinuses.
  • The CT scan showed a polyp in the sinus cavity.

Noun

1. one of a pair of cavities in the frontal bone