The story
- Latin · learned borrowing fromsinus“a bent surface, curve, hollow”
- English todaysinus
Learned borrowing from Latin sinus (“a bent surface, curve, hollow”). Doublet of sine.
Words from the same roots
Etymology from Wiktionary, CC BY-SA 4.0.
sinus
Today it means: A pouch or cavity in a bone or other tissue, especially one in the bones of the face or skull connecting with the nasal cavities (the paranasal sinus). Full definition →
Latin sinus