Refine this word faster

Sinus

//ˈsaɪ.nəs// noun

Noun

1
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).
2
a wide channel containing blood; does not have the coating of an ordinary blood vessel wordnet
3
An irregular venous or lymphatic cavity, reservoir, or dilated vessel.
4
any of various air-filled cavities especially in the bones of the skull wordnet
5
An irregular venous or lymphatic cavity, reservoir, or dilated vessel.; Relating to or denoting the sinoatrial node of the heart or its function of regulating the heartbeat. attributive

Show 5 more definitions

6
an abnormal passage leading from a suppurating cavity to the body surface wordnet
7
An abnormal cavity or passage such as a fistula, leading from a deep-seated infection and discharging pus to the surface.
8
A rounded notch or depression between two lobes or teeth in the margin of a leaf or petal.
9
A bay of the sea; a recess in the shore.
10
Synonym of sine.
"So, in the helicopteron, as the helix is at the same time a sustaining plane, it should be likened to a surface moving horizontally, and in which, consequenty, the resistance to motion will be to the lifting power as the sinus is to the cosinus of the angle formed by such plane with the horizon."

Learned borrowing from Latin sinus (“a bent surface, curve, hollow”). Doublet of sine.

Unscramble this word: sinus