sinus opening

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• 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 …   The Collaborative International Dictionary of English

• 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 …   The Collaborative International Dictionary of English

• Sinus venosus — 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… …   The Collaborative International Dictionary of English

• sinus — [sī′nəs] n. [L, a bend, curve, fold] 1. a bend or curve 2. any cavity or hollow formed by a bending or curving 3. Anat. Zool. any of various cavities, hollows, or passages; esp., a) any of the air cavities in the skull opening into the nasal… …   English World dictionary

• Sinus ostium — A sinus ostium (plural: sinus ostia) is the opening that connects a sinus to the nasal cavity itself. It is a tight area that tends to have a higher percentage of cilia than the surrounding mucosa. If the sinus ostium is blocked this will cause… …   Wikipedia

• sinus — sinuslike, adj. /suy neuhs/, n., pl. sinuses. 1. a curve; bend. 2. a curving part or recess. 3. Anat. a. any of various cavities, recesses, or passages, as a hollow in a bone, or a reservoir or channel for venous blood. b. one of the hollow… …   Universalium

• Sinus-lift procedure — A sinus lift procedure is a surgical procedure, performed by an appropriately trained dentist or dental specialist, to augment bone mass in the top jaw (maxilla), which increases the likelihood of successful placement of dental implants. Bone… …   Wikipedia

• Sinus venosus — This article is on an embryological structure. For the heart defect of the same name, please see atrial septal defect. Infobox Embryology Name = Sinus venosus Latin = GraySubject = 138 GrayPage = 528 Caption = Interior of dorsal half of heart… …   Wikipedia

• opening — A gap in or entrance to an organ, tube, or cavity. SEE ALSO: aperture, fossa, ostium, orifice, pore. access o. SYN: access. aortic o. SYN: aortic hiatus …   Medical dictionary

• sinus — 1. [TA] A channel for the passage of blood or lymph, without the coats of an ordinary vessel; e.g., blood passages in the gravid uterus or those in the cerebral meninges. 2. [TA] A cavity or …   Medical dictionary

• opening of coronary sinus — ostium sinus coronarii …   Medical dictionary