| bulk modulus | modulus of volume elasticity |
|---|---|
| modulus | Origin: L, a small measure. See Module. <mathematics> A quantity or coefficient, or constant, which expresses the measure of some specified force, property, or quality, as of elasticity, strength, efficiency, etc.; a parameter. Modulus of a machine, a formula expressing the work which a given machine can perform under the conditions involved in its construction; the relation between the work done upon a machine by the moving power, and that yielded at the working points, either constantly, if its motion be uniform, or in the interval of time which it occupies in passing from any given velocity to the same velocity again, if its motion be variable; called also the efficiency of the machine. <mathematics> Modulus of a system of logarithms, a number by which all the Napierian logarithms must be multiplied to obtain the logarithms in another system. Modulus of elasticity. The measure of the elastic force of any substance, expressed by the ratio of a stress on a given unit of the substance to the accompanying distortion, or strain. An expression of the force (usually in terms of the height in feet or weight in pounds of a column of the same body) which would be necessary to elongate a prismatic body of a transverse section equal to a given unit, as a square inch or foot, to double, or to compress it to half, its original length, were that degree of elongation or compression possible, or within the limits of elasticity; called also Young's modulus. Modulus of rupture, the measure of the force necessary to break a given substance across, as a beam, expressed by eighteen times the load which is required to break a bar of one inch square, supported flatwise at two points one foot apart, and loaded in the middle between the points of support. Source: Websters Dictionary (01 Mar 1998) |
| modulus of elasticity | A coefficient expressing the ratio between stress per unit area acting to deform a body and the amount of deformation that results from it. Modulus of volume elasticity, a coefficient expressing the ratio between pressure acting to change the volume of a substance and the amount of change that results from it. Synonym: bulk modulus. Young's modulus, a type of modulus of elasticity which specifies the force applied to a body in one direction, per unit cross-sectional area of the body perpendicular to that direction, divided by the fractional change in length of the body in that direction. (05 Mar 2000) |
| anterior elastic layer | A transparent homogeneous acellular layer, 6 to 9 um thick, lying between the basal lamina of the outer layer of stratified epithelium and the substantia propria of the cornea; considered to be a basement membrane. Synonym: lamina limitans anterior corneae, anterior elastic layer, Bowman's membrane, lamina elastica anterior, limiting layers of cornea. (05 Mar 2000) |
| Verhoeff's elastic tissue stain | <technique> A stain for tissue sections in which a mixture of haematoxylin, ferric chloride, and Lugol's iodine solution is used; tissue may be counterstained, if desired, with eosin or van Gieson's stain; elastic fibres and nuclei appear blue-black to black while collagen and other components are shades of pink to red. (05 Mar 2000) |
| vertical elastic | Elastic material used in a direction perpendicular to the occlusal plane, connecting one arch wire to the other, and usually used to improve intercuspation. (05 Mar 2000) |
| posterior elastic layer | A transparent homogeneous acellular layer between the substantia propria and the endothelial layer of the cornea; considered to be a highly developed basement membrane. Synonym: lamina limitans posterior corneae, membrana vitrea, Descemet's membrane, Duddell's membrane, entocornea, hyaloid membrane, lamina elastica posterior, limiting layers of cornea, membrana hyaloidea, posterior elastic layer, tunica vitrea, vitreous membrane. (05 Mar 2000) |
| Henle's fenestrated elastic membrane | elastic laminae of arteries |
| Sattler's elastic layer | The middle layer of the choroid. (05 Mar 2000) |
| hyaline degeneration of the elastic tissue of the arterial wall | Seen during involution of the uterus. (05 Mar 2000) |
| intermaxillary elastic | Material used to provide elastic traction between the upper and lower teeth. (05 Mar 2000) |
| elastic | Susceptible of resisting and recovering from stretching, compression or distortion applied by a force. Origin: L. Elasticus (18 Nov 1997) |
| elastic artery | <anatomy, artery> A large artery, such as the aorta or pulmonary artery, which has many elastic lamella in its tunica media. (05 Mar 2000) |
| elastic bandage | A bandage containing stretchable material; used to make local pressure. (05 Mar 2000) |
| elastic band fixation | The stabilization of fractured segments of the jaws by means of intermaxillary elastics applied to splints or appliances. (05 Mar 2000) |