The processes by which magma and its associated gases rise in the crust
and are extruded onto the Earth's surface and into the atmosphere. Also
spelled vulcanism. Syn:volcanicity
An obsolete term variously used to denote a volcanic rock and selenian
sulfur.
a. A vent in the surface of the Earth through which magma and associated
gases and ash erupt; also, the form or structure, usually conical, that is
produced by the ejected material. AGI
b. Any eruption of material; e.g., mud, that resembles a magmatic volcano.
Obsolete var; vulcano. Pl: volcanoes. Etymol: the Roman deity of fire,
Vulcan. AGI
See:volkonskoite
The place where tin ore is stored to be dried before being put into a
smelting furnace. Syn:vol
A lubricant for enclosed gear units; composed of high-quality mineral oil
with a suspension of superfine colloidal graphite and silicone foam
inhibitor. Nelson
A discredited term equal to stibiconite. Am. Mineral., 1
A monoclinic mineral, Ca0.3 (Cr,Mg,Fe)2 (Si,Al)4 O
10 (OH)2 .4H2 O ; smectite group. Also spelled
volchonskoite.
The act of exploding blasts in sections. A round of holes fired at any one
time. Standard, 2; Fay
The practical meter-kilogram-second (mks) unit of electrical potential
difference and electromotive force (emf) that equals the difference of
potential between two points in a conducting wire carrying a constant
current of 1 A when the power dissipated between these two points equals 1
W. It equals the potential difference across a resistance of 1 Omega when
1 A of current is flowing through it; the standard in the United States.
Webster 3rd
Electromotive force. Nichols, 1
An isometric mineral, K2 Fe9 (SO4 )12 .18H
2 O ; has both ferric and ferrous iron.
A list or series of metals, such that any one will be at a higher
electrical potential when put in contact with any of those that follow,
and at a lower potential if in contact with any metal before it in the
series. Fay
An instrument for determining voltage. Crispin
Wurtzite mixed with an organometallic zinc compound.
A crystal structure deviating from ideality by having two or more chemical
species in one or more crystal sites. CF:crystal defect; disorder.
See:susceptibility
Chemical analysis based upon the reaction of a volume of standard solution
with the material being analyzed. ASTM
Quantitative chemical analysis in which known weight of sample is
dissolved and reacted with a standard chemical solution of strength
proportional to its normality or hydrogen equivalent. Completion of
reaction (end point) is judged by change of color, incipient
precipitation, or effect on an indicator. See also:dry assay;
wet assay. Pryor, 3
a. The ratio of the total quantity of air passing along the faces to the
quantity flowing in the fan drift.
See also:overall ventilation efficiency; surface air leakage.
Roberts, 1
b. The ratio of the volume of air discharged to the displacement for a fan
or compressor. Hartman, 2
c. The volume of water that enters a pump cylinder for each piston stroke
divided by the volume swept by the piston (piston area times stroke).
Nelson
The decrease in volume, expressed as a percentage of the soil mass when
dried, of a soil mass when the water content is reduced from a given
percentage to the shrinkage limit. Also called volumetric change.
ASCE