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1. sievelike; cribriform.

eth·moid bone

an irregularly shaped bone lying between the orbital plates of the frontal bone and anterior to the sphenoid bone of the cranium; it consists of two lateral ethmoidal labyrinths of thin plates enclosing air cells, attached above to a perforated horizontal lamina, the cribriform plate, from which descends a median, vertical, perpendicular plate in the interval between the two labyrinths; the bone articulates with the sphenoid, frontal, maxillary, lacrimal, and palatine bones, the inferior nasal concha, and the vomer; it enters into the formation of the anterior cranial fossa, the orbits, and the nasal cavity, forming the supreme, superior, and middle conchae of the latter.


(ĕth′moid′) also


Of, relating to, or being a light spongy bone located between the ocular orbits, forming part of the walls and septum of the superior nasal cavity, and containing numerous perforations for the passage of the fibers of the olfactory nerves.
The ethmoid bone.


(eth'moyd) [TA]
1. Resembling a sieve.
2. Relating to the ethmoid bone.
Synonym(s): ethmoidal.
[G. ēthmos, sieve, + eidos, resemblance]
References in periodicals archive ?
Keeping the objectives of endoscopic sinus surgery, all 52 patients underwent appropriate exenteration of ethmoid cells and thereby obtaining wider access to major sinuses.
Anatomical abbreviations are:a-a, angular-articular; bo, basioccipital; de, dentary; fr, frontal; fv, facet on maxilla for articulation with vomer; ipr, internal (anterior) process of the maxilla; le, lateral ethmoid; mpr, maxillary (posterior) process of the maxilla; rex, maxilla(e); ha, nasal; nc, nutrient canal; pa, parasphenoid; pd, predentary; pmx, premaxilla(e); pn, prenasal; pop, preopercle; pt, pterygoid; qu, quadrate; sph, sphenotic; tr, triangular region of maxilla; vo, vomer.
* Ethmoid sinuses just behind the bridge of the nose and between the eyes
Among sarcomatous lesion (2 in no.), maxillary antrum was involved in one case while ethmoids in another cases.
1--Duration of disease is qualified by ongoing symptoms more than 12 weeks or more than 12 weeks of physical findings (signs will support the symptom time duration) 2--One of these signs of inflammation in association with symptoms: a) Disoloured drainage, nasal polyp or polypoid swelling on physical examination with anterior rhinoscopy or nasal endoscopy b) Edema or erythema of middle meatus as identified by nasal endoscopy c) Generalized edema, erythema or granulation tissue (if it does not involve middle meatus or ethmoid bulla, radiological imaging is required.
Paranasal sinus involvement was present in 4 patients; 2 patients (22.2%) had ethmoid sinus involvement only, 1 had sphenoid sinus involvement only, and 1 had both ethmoid and sphenoid sinus involvement.
Roughly, 1 in 200 viral upper respiratory tract occasions results in an auxiliary bacterial infection of the sinuses with the ethmoids and maxillary regarded the most regularly included.
We performed a right uncinectomy, removed the anterior ethmoid cells, and perforated the ground lamella in order to approach the posterior ethmoids, which were filled with the soft, smooth mass.
The neurocranium contains the anterior-most part of the frontals, lateral ethmoids, nasals, and posterior parts of the prenasals.
Type IV nerves were associated with an Onodi cell and traversed both the posterior ethmoids and the sphenoid sinus.