See Also: benzopurpurin 4B(medicine)

vortex (iou) and benzopurpurin 4B (medicine)


vortex (iou)



vortex noun. . M17.
[Latin (var. of VERTEX) an eddy of water, wind, or flame, from vortere, vertere to turn.]
a. In Cartesian theory: any of the rapidly revolving collections of fine particles supposed to fill all space and by their rotation to account for the motions of the universe; the whirling movement of such a collection of particles. Usu. in pl. M17.
b. Physics. A rapid motion of particles round an axis; a whirl of atoms, fluid, or vapour. M19.
A violent eddy of the air; a cyclone; the central portion of this. Also, an eddying mass of fire. M17.
Monitor (Texas) A tornado..that sucked a man into its vortex.
A swirling mass of water; a whirlpool. E18.
fig.
a. A whirl or constant round of frenetic activity, rapid change, etc. M18.
D. Cecil She plunged him into a vortex of social activity. M. Ignatieff Someone who..kept his distance from the vortex of Petersburg intrigue.
b. A place or state into which people or things are irresistibly drawn. L18.
J. Wain Streatham, Tooting, Fulhamvanished places, swallowed up in the vortex of London.
The group of vorticist artists. E20.
Comb.: vortex shedding the periodic detachment of vortices from an object in a fluid flow, causing a varying force to be experienced by the object; vortex sheet a region of vortices that is created at the interface of two masses of fluid having different velocities along the interface; vortex street: see STREET noun 3a; vortex turbine, vortex wheel a turbine in which the water enters tangentially at the circumference and is discharged at the centre.

benzopurpurin 4B (medicine)


benzopurpurin 4B


A red acid dye, C34H26N6O6S2Na2, formerly used as a plasma stain and as an indicator (changes from violet to red in the pH range 1.2 to 4.0).