sinus

n 1: an abnormal passage leading from a suppurating cavity to the

body surface [syn: {fistula}]

2: any of various air-filled cavities especially in the bones

of the skull

3: a wide channel containing blood; does not have the coating

of an ordinary blood vessel [syn: {venous sinus}]

minus

-

Common: dash; {ITU-T}: hyphen; {ITU-T}: minus. Rare:

{INTERCAL}: worm; option; dak; bithorpe.