s 1 i 1 n 1 u 1 s 1
5 letters · 5 points in Scrabble
Meaning
noun an abnormal passage leading from a suppurating cavity to the body surface
noun any of various air-filled cavities especially in the bones of the skull
noun a wide channel containing blood; does not have the coating of an ordinary blood vessel
originLearned borrowing from Latin sinus (“a bent surface, curve, hollow”). Doublet of sine.
Etymology from Wiktionary, CC BY-SA 3.0