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Today it means

sinus

an air-filled cavity in the skull, connected to the nasal passages

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Where does the word "sinus" come from? It comes from Latin sinus, and was adopted directly into English (1400s).

Read the full story

Where does the word "sinus" come from? It comes from Latin sinus, and was adopted directly into English (1400s).

Sinus’s story begins in Latin: sinus meant “a curve, a hollow.” Literally a curve, a fold, or a hollow. It reached English by 1400s as sinus. Latin 'curve, fold, bay'. Today, sinus means an air-filled cavity in the skull, connected to the nasal passages.

  1. Stage 1 · Latin · ancient sinus "a curve, a hollow", literally a curve, a fold, or a hollow.
  2. Stage 2 · English · 1400s sinus "an air-filled cavity in the skull", Latin 'curve, fold, bay'.

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