| ethmo- | Combining form denoting:1. Ethmoid. 2. The ethmoid bone. Origin: G. Ethmos, sieve (05 Mar 2000) |
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| ethmocranial | Relating to the ethmoid bone and the cranium as a whole. (05 Mar 2000) |
| ethmofrontal | Relating to the ethmoid and the frontal bones. (05 Mar 2000) |
| ethmoid | <anatomy> The ethmoid bone. Source: Websters Dictionary (01 Mar 1998) |
| ethmoid air cells | The numerous small air-filled cells of the ethmoidal labyrinth. See: anterior ethmoidal air cells, middle ethmoidal air cells, posterior ethmoidal air cells. Synonym: cellulae ethmoidales, sinus ethmoidales, ethmoidal cells. (05 Mar 2000) |
| ethmoid angle | The angle made by the plane of the cribriform plate of the ethmoid bone extended to meet the basicranial axis. (05 Mar 2000) |
| ethmoid bone | An irregularly shaped bone lying between the orbital plates of the frontal and anterior to the sphenoid bone; it consists of two lateral masses of thin plates enclosing air cells, attached above to a perforated horizontal lamina, the cribriform plate, from which descends a median vertical or perpendicular plate in the interval between the two lateral masses; 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. Synonym: os ethmoidale. (05 Mar 2000) |
| ethmoid infundibulum | A passage from the middle meatus of the nose communicating with the anterior ethmoidal cells and frontal sinus. Synonym: infundibulum ethmoidale, ethmoid infundibulum. (05 Mar 2000) |
| ethmoid sinus | Numerous small thin-walled spaces or air cells in the ethmoid bone, where they form an ethmoidal labyrinth. (12 Dec 1998) |
| ethmoid sinusitis | Inflammation of the ethmoid sinus. It may present itself as an acute (associated with viral rhinitis) or chronic (associated with allergic or hyperplastic sinusitis) condition. (12 Dec 1998) |
| ethmoidal | <anatomy> Like a sieve; cribriform. Pertaining to, or in the region of, the ethmoid bone. <anatomy> Ethmoid bone, a bone of complicated structure through which the olfactory nerves pass out of the cranium and over which they are largely distributed. Origin: Gr. Like a sieve; sieve + from: cf. F. Ethmoide, ethmoidal. Source: Websters Dictionary (01 Mar 1998) |
| ethmoidal bulla | A bulging of the inner wall of the ethmoidal labyrinth in the middle meatus of the nose, just below the middle nasal concha; it is regarded as a rudimentary concha. Synonym: bulla ethmoidalis. (05 Mar 2000) |
| ethmoidal cells | The numerous small air-filled cells of the ethmoidal labyrinth. See: anterior ethmoidal air cells, middle ethmoidal air cells, posterior ethmoidal air cells. Synonym: cellulae ethmoidales, sinus ethmoidales, ethmoidal cells. (05 Mar 2000) |
| ethmoidal crest | Bony ridge which articulates with, or provides attachment for, any part of the ethmoid bone, especially the middle nasal concha. See: ethmoidal crest of maxilla, ethmoidal crest of palatine bone. Synonym: crista ethmoidalis. (05 Mar 2000) |
| ethmoidal crest of maxilla | A ridge on the upper part of the nasal surface of the frontal process of the maxilla that gives attachment to the anterior portion of the middle nasal concha. Synonym: crista ethmoidalis maxillae. (05 Mar 2000) |