Sinus

Definition of Sinus

Si´nus
n.1.An opening; a hollow; a bending.
2.A bay of the sea; a recess in the shore.
3.(Anat. & Zool.) A cavity; a depression.
4.(Med.) A narrow, elongated cavity, in which pus is collected; an elongated abscess with only a small orifice.
5.(Bot.) A depression between adjoining lobes.
Pallial sinus
(Zool.) See under Pallial.
Sinus venosus
a - (Anat.) 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.

Related Words

alveolation, alveolus, antrum, arc, armpit, basin, bow, bowl, catacaustic, catenary, caustic, cavity, circle, concave, concavity, conchoid, crater, crook, crypt, cup, curl, curve, depression, diacaustic, dip, ellipse, festoon, fold, follicle, funnel chest, hole, hollow, hollow shell, hook, hyperbola, lacuna, lituus, parabola, pit, pocket, punch bowl, scoop, shell, sink, socket, tracery, trough, vug
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