opening of frontal sinus
Look at other dictionaries:
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 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
apertura sinus frontalis — [TA] opening of frontal sinus: the external opening of the frontal sinus into the nasal cavity; its structure is variable, but it usually drains into the middle meatus. Called also frontal ostium, frontal sinus ostium, and ostium of frontal sinus … Medical dictionary
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 — 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
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
Maxillary sinus — Outline of bones of face, showing position of air sinuses. Latin sinus maxilliaris Gray s … Wikipedia
Ethmoid sinus — Bone: Ethmoid sinus Paranasal sinuses … Wikipedia
aperture — 1. An inlet or entrance to a cavity or channel. in anatomy, an open gap or hole. SEE ALSO: fossa, ostium, orifice, pore. 2. The diameter of the objective of a microscope. SYN … Medical dictionary
apertura — SYN: aperture. [L. fr. aperio, pp. apertus, to open] a. aqueductus cerebri opening of aqueduct of midbrain. a. aqueductus mesencephali [TA] SYN: opening of aqueduct of midbrain. a. canaliculi cochleae SYN: external opening of … Medical dictionary
