sinus
1. sin, sinus
ratio of the length of the side opposite the given angle to the length of the hypotenuse of a right-angled triangle [razmerje med dolžino nasprotne stranice danemu kotu in dolžino hipotenuze pravokotnega trikotnika]
2. sinus, fistula
an abnormal passage leading from a suppurating cavity to the body surface [nenormalni prehod, ki vodi iz gnojnega votlega prostora na površino telesa]
3. sinus
any of various air-filled cavities especially in the bones of the skull [katerakoli od številnih zračnih votlin, zlasti v kosteh lobanje]
4. sinus
a wide channel containing blood; does not have the coating of an ordinary blood vessel [širok kanal, ki vsebuje kri in nima obloge običajne krvne žile]