• IPA: /ˈsaɪnəs/

sinus (plural sinuses)

  1. (anatomy) A pouch or cavity in any organ or tissue, especially the paranasal sinus.
  2. (anatomy) A channel for transmitting venous blood.
    Synonyms: sinusoid
  3. (botany) A notch or depression between two lobes or teeth in the margin of an organ.
  4. (pathology) An abnormal cavity or passage such as a fistula, caused by the destruction of tissue.
  5. A bay of the sea; a recess in the shore.
Related terms

  • French: sinus
  • German: Sinus, (paranasal) Nasennebenhöhle
  • Italian: seno
  • Portuguese: seio
  • Russian: па́зуха
  • Spanish: seno
  • Russian: свищ

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