Found 2 items, similar to Sinus.
English → English (WordNet)
Definition: sinus
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]
English → English (gcide)
Definition: Sinus
Sinus
\Si"nus\, n.; pl. L.
Sinus, E.
Sinuses. [L., a bent
surface, a curve, the folds or bosom of a garment, etc., a
bay. Cf.
Sine, n.]
1. An opening; a hollow; a bending.
[1913 Webster]
2. A bay of the sea; a recess in the shore.
[1913 Webster]
3. (Anat. & Zo["o]l.) A cavity; a depression. Specifically:
(a) A cavity in a bone or other part, either closed or
with a narrow opening.
(b) A dilated vessel or canal.
[1913 Webster]
4. (Med.) A narrow, elongated cavity, in which pus is
collected; an elongated abscess with only a small orifice.
[1913 Webster]
5. (Bot.) A depression between adjoining lobes.
[1913 Webster]
Note: A sinus may be rounded, as in the leaf of the white
oak, or acute, as in that of the red maple.
[1913 Webster]
Pallial sinus. (Zo["o]l.) See under
Pallial.
Sinus venosus. [L., venous dilatation.] (Anat.)
(a) The main part of the cavity of the right auricle of
the heart in the higher vertebrates.
(b) In the lower vertebrates, a distinct chamber of the
heart formed by the union of the large systematic
veins and opening into the auricle.
[1913 Webster]
Sinus
\Si"nus\, n.; pl. L.
Sinus, E.
Sinuses. [L., a bent
surface, a curve, the folds or bosom of a garment, etc., a
bay. Cf.
Sine, n.]
1. An opening; a hollow; a bending.
[1913 Webster]
2. A bay of the sea; a recess in the shore.
[1913 Webster]
3. (Anat. & Zo["o]l.) A cavity; a depression. Specifically:
(a) A cavity in a bone or other part, either closed or
with a narrow opening.
(b) A dilated vessel or canal.
[1913 Webster]
4. (Med.) A narrow, elongated cavity, in which pus is
collected; an elongated abscess with only a small orifice.
[1913 Webster]
5. (Bot.) A depression between adjoining lobes.
[1913 Webster]
Note: A sinus may be rounded, as in the leaf of the white
oak, or acute, as in that of the red maple.
[1913 Webster]
Pallial sinus. (Zo["o]l.) See under
Pallial.
Sinus venosus. [L., venous dilatation.] (Anat.)
(a) The main part of the cavity of the right auricle of
the heart in the higher vertebrates.
(b) In the lower vertebrates, a distinct chamber of the
heart formed by the union of the large systematic
veins and opening into the auricle.
[1913 Webster]