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Smart Definition
Etymology
Pronunciation
sinusal
sinus
sinus
sinus
+
-al
relating to
Sinusal means sinus (as an adjective) and can be thought of as sinus0 + -al1 (relating to1).
adjective
  1. sinus
    Relating to or affecting the sinuses
    El paciente sufre de congestión sinusal. // The patient suffers from sinus congestion.