(n.) The Gorgon; or one of the Gorgons whose hair was changed into serpents, after which all who looked upon her were turned into stone.
(n.) Any free swimming acaleph; a jellyfish.
Example Sentences:
(1) "I keep seeing visions of a woman with Medusa-like grey hair," Langdon murmured.
(2) Investigation on important medusae and the chemistry of their nematocyst venoms have been expanding.
(3) Complications worth mentioning included three slight losses of vitreous, bleeding into the anterior chamber in four cases, and one loss of the anterior chamber with caput medusae of the iris and secondary opacification of the lens.
(4) Bacillus medusa was found to carry three phages or phagelike structures named phi med-1, phi med-2, and phi med-3.
(5) Small medusae possess a circulatory system of narrow tubes subdivided into several compartments by functional "sphincters."
(6) B. medusa produced small numbers of phi med-2 during growth.
(7) Normally, vertebral pathways with sufficient circulation prevent oedema of the limbs, bilateral varicoceles and caput medusae of the abdominal wall.
(8) It appears to participate in the formation of a surface layer on the parasporal inclusion of B. medusa.
(9) The responses of Aurelia medusae to pharmacological agents and ionic variation were classified into four response types: Type I, no response; Type II, inhibition of pacemaker activity; Type III, inhibition of both pacemakers and swimming muscles; and Type IV, increase in pacemaker output.
(10) In portal hypertension, three types of cutaneous portosystemic collaterals may develop: the 'classical' caput Medusae, enterostomal varices and scar or adhesion-related abdominal collaterals.
(11) The diagnosis was made by real-time ultrasonography, which showed echographic caput medusae with large afferent umbilical veins and efferent inferior superficial epigastric veins.
(12) Consideration of these properties of the organisation of this species suggests that normal slow swimming is controlled by a mechanism similar to that found in other medusae, while the escape response is the result of the action of the giant axons.
(13) The "RS" variant ("medusae head" surface colonies) is not pathogenic for mice and guinea pigs (even B. anthracis) if the tested strains are cultivated for years in ordinary solid nutrient media; the same morphological variants are strongly pathogenic (also B. subtilis), when the strains are recently isolated from infected animals.
(14) The comparison of the responses to the test solutions between the medusa, scyphistoma, and strobila showed that the neuromuscular systems are physiologically different.
(15) Abdominal varices consisting of a caput medusae and dilated mesenteric veins resulted in pooling of Tc-99m tagged red blood cells (RBC) within these dilated vessels in a 57-year-old man with severe Laennec's cirrhosis.
(16) Using a radioimmunoassay for the peptide sequence Arg-Phe-NH2 (RFamide), two peptides have now been purified from acetic acid extracts of this medusa.
(17) A novel method for separating porphyrin polycarboxylic acids is described and illustrated by its application to the direct analysis of biological (deep-sea medusae), clinical (urine) and chemical ('haematoporphyrin derivative') samples.
(18) Dr Elizabeth Sinskey, CEO of the World Health Organisation, combed her Medusa-like grey hair and thought unnecessarily of the glucocorticoid treatment that had destroyed her reproductive system.
(19) Angiography with Tc-99m labeled RBCs demonstrated an arterioportal fistula and a caput medusa.
(20) Similarly, the responses of adult medusae to ionic variation show no consistent pattern within various scyphomedusae.
Velum
Definition:
(n.) Curtain or covering; -- applied to various membranous partitions, especially to the soft palate. See under Palate.
(n.) See Veil, n., 3 (b).
(n.) A thin membrane surrounding the sporocarps of quillworts Isoetes).
(n.) A veil-like organ or part.
(n.) The circular membrane that partially incloses the space beneath the umbrella of hydroid medusae.
(n.) A delicate funnel-like membrane around the flagellum of certain Infusoria. See Illust. a of Protozoa.
Example Sentences:
(1) MRI revealed cranium bifida and agenesis of anterior medullar velum.
(2) To compare biochemical differences between bivalves with and without endosymbiotic chemoautotrophic bacteria, specimens of Solemya velum, a bivalve species known to contain bacterial endosymbionts, and the symbiont-free soft-shelled clam Mya arenaria, were collected from the same subtidal reducing sediments during October and November 1988.
(3) The Z-plasties facilitate effective dissection and redirection of the palatal muscles to produce an overlapping muscle sling and lengthen the velum without using tissue from the hard palate, which permits hard palate closure without pushback or lateral relaxing incisions.
(4) We now report that, compared to controls, rats with acute EAE exhibit fewer detectable mast cells in their dura mater and velum interpositum.
(5) The superior medullary velum was not recognized in 10 cases and the corpus medullare in 5.
(6) Its efficacy is generally accepted, and its use, especially in cases of obstructive sleep apnea syndrome, is the only treatment of the palatal velum at present practiced.
(7) The axons originate in dorsal dendrites, run dorsally along the border of the gray matter and pierce the velum medullare on the contralateral side.
(8) While coughing the movement of the velum is purely passive because of the exspirational thrust.
(9) The velopharyngeal closure patterns can be grouped into five categories according to the manner of the velum and lateral pharyngeal wall movements.
(10) Few 5-HT nerve terminals occurred only on the roof of the fourth ventricle (velum medullare, lamina epithelialis of the tela chorioidea), and the surface of the choroid plexus epithelia was devoid of such nerves.
(11) The inferior medullary velum and tela choroidea were removed intact from the fourth ventricle, post-osmicated, dehydrated, critical point dried, coated with palladium-gold and examined in a Cambridge Stereoscan S4 scanning electron microscope.
(12) The clinical presentation, radiological findings, and surgical management of two cases of meningioma arising from the velum interpositum without dural attachment are described.
(13) The delta 13C and delta 15N ratios of the amino acids are very similar to the isotope ratios previously found in both the endosymbionts and whole tissues of S. velum.
(14) Five patients evaluated via multi-view videofluoroscopy were found to have incongruous movements between the velum and lateral aspects of the pharyngeal walls.
(15) They are lined on the inside towards the distal part of the velum by thin epithelium and towards the proximal part by ciliated sensory cells.
(16) The cerebellum, the beginning of which was already noted at stages 13 and 14, consists of (1) a rostral part that arises from the alar plate of the isthmic segment and will form the superior medullary velum and part of the corpus cerebelli; and (2) a caudal part that develops from rhombomere 1.
(17) The measuring principle is described and the movements of the velum during speech production are demonstrated in cleft palate patients with different speech results.
(18) In individuals without pharyngeal flap surgery the velum was displaced in the anterior direction and its position could be influenced by the pushback of the mandible.
(19) In addition to this permanement neurogenous myoclonus, there are also rhythmical contractions of the velum, usually considered to be psychogenous.
(20) The second procedure is for use after exeresis involving all or almost all of the soft palate and a half of the posterior pharyngeal wall, and makes use of velum palatinum reconstruction.