What's the difference between crystal and sphenoid?
Crystal
Definition:
(n.) The regular form which a substance tends to assume in solidifying, through the inherent power of cohesive attraction. It is bounded by plane surfaces, symmetrically arranged, and each species of crystal has fixed axial ratios. See Crystallization.
(n.) The material of quartz, in crystallization transparent or nearly so, and either colorless or slightly tinged with gray, or the like; -- called also rock crystal. Ornamental vessels are made of it. Cf. Smoky quartz, Pebble; also Brazilian pebble, under Brazilian.
(n.) A species of glass, more perfect in its composition and manufacture than common glass, and often cut into ornamental forms. See Flint glass.
(n.) The glass over the dial of a watch case.
(n.) Anything resembling crystal, as clear water, etc.
(1) Such a signal must be due to a small ferromagnetic crystal formed when the nerve is subjected to pressure, such as that due to mechanical injury.
(2) A comprehensive review of the roentgenographic features of calcium pyrophosphate crystal deposition disease (pseudogout) is presented.
(3) CW Nd:YAG light transmitted by fiber optic cable and sapphire crystal was applied transsclerally to the ciliary body of pigmented and albino rabbits.
(4) The crystal structure of the biological stain, "acridine orange," has been determined.
(5) Urinalysis revealed a low pH, increased ketones and bilirubin excretion, dark yellowish change in color, the appearance of "leaflet-shaped" crystals and increased red blood cells and epithelial cells in the urinary sediment, increased water intake, decreased specific gravity and decreased sodium, potassium and chloride in the urine.
(6) Early in the regression process, cholesterol esters are reduced at least partly by hydrolysis to yield cholesterol, some of which may crystallize and inhibit rapid regression.
(7) Here we determine the position of bound ADP diffused into the recA crystal.
(8) The virus material in these crystals had been subjected to treatment with EDTA at pH 8.0 before crystallization at pH 6.5.
(9) Results obtained show that chlorophyll is more active than other inhibitors studied and suggest a higher surface adsorption intensity on the primary sources of the crystal surface.
(10) The "Mg(2+)-Sarkosyl crystals" (M band) technique distinguishes between membrane-bound and free intracellular DNA.
(11) The molecular structure of the hexagonal crystal form of porcine pepsin (EC 3.4.23.1), an aspartic proteinase from the gastric mucosa, has been determined by molecular replacement using the fungal enzyme, penicillopepsin (EC 3.4.23.6), as the search model.
(12) In vitro experiments show that these macromolecules are able to interact with specific faces of different crystals, influencing both nucleation and crystal growth.
(13) 2 Each of the drugs significantly increased leucocyte cyclic AMP content within 3 h of the injection of crystals.
(14) For Kevin Phillips, just like Wilfried Zaha, this might have been his final act as a Crystal Palace player.
(15) In ancillary studies, multiple cycles of direct dissolution of UCB crystals revealed a progressive decrease in aqueous solubility of UCB as fine crystals were removed; this effect was minimal in CHCl3.
(16) Six dogs were instrumented with electromagnetic flow probes and subendocardial ultrasonic crystals.
(17) The crystallization of the lipase was successfully carried out.
(18) The values of the energy level distributions in crystals obtained from the measurements and analysis reported here are compared with those obtained by a different method for the same protein complex in frozen solution.
(19) The crystal structure of proteolytically modified human ACT has been solved at 2.7-A resolution (Baumann et al., 1991).
(20) These observations support our hypothesis that calcium pyrophosphate dihydrate crystal deposition in joints is regulated by the physical chemical gel state of the connective tissue matrix.
Sphenoid
Definition:
(a.) Wedge-shaped; as, a sphenoid crystal.
(a.) Of or pertaining to the sphenoid bone.
(n.) A wedge-shaped crystal bounded by four equal isosceles triangles. It is the hemihedral form of a square pyramid.
(n.) The sphenoid bone.
Example Sentences:
(1) The resection included the skin, globe, sphenoid wings, and orbitofrontal bone.
(2) In Patient 2, rhinorrhoea and presumably entry of infection was facilitated by unplugging of a defect in the wall of the sphenoid sinus by bromocriptine-induced shrinkage of the pituitary adenoma.
(3) This difference, however, did not influence the detection of rhythmical ictal activity in cheek and sphenoidal montages in our study, nor the assignment of side, site or time of seizure onset by unbiased readers.
(4) The other structures or regions that were involved, in decreasing order of frequency, were the sphenoid sinus (26.7%), nasal fossa (21.8%), and ethmoid sinus (18.3%).
(5) A case of isolated sphenoidal tumor localization in a child without any endocrinological disorder and revealing an histiocytosis X is reported.
(6) Except when the sphenoid sinus or the middle cranial fossa is involved, it is advisable to set the height of the upper margin of the lateral facial field at a level no higher than the diaphragma sellae.
(7) This paper reviews 14 patients presenting with acute sphenoid sinusitis between 1978 and 1987.
(8) The operative method involves removal of portions of the orbital rim, orbital roof, and sphenoid bone.
(9) the sphenoid, ethmoid, and occipital bones) and to abnormal spatial relationships between the cribriform plate and the crista galli, resulting in a positional disarrangement of the points of basal attachment of the dura matter.
(10) Canal structures, remnants of the craniopharyngeal canal, were observed in specimens showing bilateral centers of ossification in the sphenoid corpus.
(11) Inflammatory disease of the posterior sinuses (sphenoid and posterior ethmoid cells) may not clinically be apparent and might be overlooked.
(12) A new staging system according to the regions involved was used; 31 patients in whom the tumour was limited to the nasopharynx (Stage I) and those with superior spread into the ethmoid or sphenoid sinuses (Stage IIA) had their tumours removed by a transpalatal route, alone or in combination with other approaches.
(13) The common sites of extra-nasopharyngeal extension detected by CT scan are: parapharyngeal space, intracranial invasion, sphenoidal sinus, orbit, ethmoidal sinus, maxillary antrum, oropharynx and the nasal cavity.
(14) A soft reddish brown mass was found in the sphenoid sinus and the bilateral cavernous sinus extending from the sella turcica.
(15) The arteriogram demonstrated supply to the tumor from numerous hypertrophied branches of the cavernous portion of the internal carotid artery and a dense tumor stain within the sphenoid sinus.
(16) Anatomic variations of the sella turcica and sphenoid sinus may complicate surgical intervention in the region of the sella turcica.
(17) A case of primary chondromyxoid fibroma of the petrous and sphenoid bones extending into the posterior clinoid process, sella, and cavernous sinus in a 26-year-old man is reported.
(18) It provides a simple, reliable, rapid technique for exposing the septum and the floor of the nose with excellent exposure to the sphenoid sinus and pituitary gland.
(19) However, the described surgical technique seems to be a good alternative for fistulas to the sphenoidal sinus and should be included in our surgical armamentarium.
(20) The maxillary sinus, the sphenoid sinus and the ethmoid cells were opened on both sides during ten resections of the skull base.