"UNIT OF MEASURMENT"              
  
Do you know the story of the facetious unit of beauty called the 'millihelen'? Since it is that the astonishingly beautiful Helen of Troy had 'a face that launched a thousand ships', a millihelen is a unit of beauty equal to the ability to launch one ship. None of the 153 units of measurement below is as interesting as that, but they just might be more useful, often in scientific and technical contexts. The proper unit is a tool to allow us to measure and organize the world - by length, volume, energy, or some other aspect of reality. And hey, we all love reality, don't we? I've avoided the simplest metric and imperial measures (gram, foot, metre, inch, etc.), but almost all the rest should be there.
Word  Definition  
aam  archaic unit of liquid measure ranging from 37 to 41 gallons of wine  
abampere  unit equivalent to 10 amperes  
abvolt  unit of electrical potential equal to one hundred millionth of a volt  
acre-breadth  old unit of length of 22 yards  
ampere  unit for measuring amount of electrical current  
angstrom  unit of one ten-billionth of a meter  
arpent  unit of land area slightly smaller than an acre  
astronomical unit  unit of distance equal to the distance from the earth to the sun  
bar  unit of pressure of one million dynes per square centimeter  
barleycorn  old unit of length equal to one-third inch  
barn  unit of area measurement of particles equal to 100 square femtometres  
baud  unit of data transmission speed of one signal event per second  
bel  unit of noise intensity equal to ten decibels  
butt  unit of volume equal to two hogsheads or 126 gallons  
calorie  unit of heat or heat-producing value  
candela  unit of luminous intensity  
carat  unit of weight of precious stones equal to 200 milligrams  
centner  old unit of weight equal to about 110 pounds  
chain  unit of length equal to 22 yards  
chaldron  old unit of dry volume equal to between 32 and 72 bushels  
clove  old weight of seven to ten pounds for wool or cheese  
cord  unit of wood equal to 128 cubic feet  
coulomb  unit of electrical charge of one ampere over period of one second  
cubit  unit of length equal to 18 inches  
curie  unit of radioactive decay and intensity  
cusec  unit of liquid flow equal to one cubic foot per second  
dalton  unit of atomic mass  
darcy  unit of permeability of rock to various substances  
dash  non-specific very small unit of measurement used in cooking  
decibel  unit for measuring sound intensity  
denier  unit of yarn fineness  
digit  unit of length equal to 3/4 of an inch  
dioptre  unit of measurement of power of lens or eye  
dol  unit for measuring intensity of pain  
dram  unit of weight equal to 1/16 of an ounce  
dyne  unit of force to accelerate 1 gram to 1 cm per second per second  
elephant  large unit of paper measurement equal to 28 by 23 inches  
ell  old unit of length equal to 45 inches  
em  unit of measuring width of typeface where width of letters equals height  
erg  unit of work measuring force of one dyne applied over one centimeter  
face-cord  unit of wood measurement equal to a stack four by eight feet in volume  
farad  unit measuring electrical capacitance  
fathom  unit of length equal to six feet used to measure depth of water  
fermi  unit of length equal to one quadrillionth of a metre  
fifth  unit of measure of liquor equal to one fifth of a gallon  
firkin  old unit of capacity equal to one quarter of a barrel  
footlambert  unit of luminance of a surface emitting one lumen per square foot  
fresnel  unit of optical frequency equal to one terahertz  
furlong  unit of distance equal to 220 yards  
gal  unit of acceleration of one centimeter per second per second  
gamma  unit of magnetic flux density equal to one nanotesla  
gauss  unit of magnetic flux density equal to 1/10000 tesla  
gilbert  unit of magnetomotive force  
gill  unit of liquid volume equal to one-quarter pint  
grain  unit of weight equal to 1/7000 of a pound  
gray  unit of absorbed dose of ionizing radiation equal to 100 rads  
hand  unit for measuring height of horses equal to 4 inches  
henry  unit of electrical inductance  
hertz  unit of frequency equal to one cycle per second  
hide  old unit of land area equal to 120 acres  
hobbet  measure of two and a half bushels  
hogshead  unit of capacity equal to 63 gallons  
horsepower  unit of power equal to 550 foot-pounds of work per second  
hundredweight  unit of weight of 100 pounds (112 pounds in UK)  
jansky  unit of strength of radio wave emission  
jiffy  unit of time used in computing equal to 1/100 second; any small unit of time  
joule  unit of work done by force of one newton over distance of one meter  
karat  unit of fineness of gold equal to 1/24 part of pure gold  
kelvin  unit of temperature based on absolute zero, equal to 1 degree Celsius  
kilderkin  old unit of capacity equal to 1/2 barrel or 18 gallons  
kilobase  unit of measure of length of nucleic acid chain equal to 1000 base pairs  
kip  unit of weight equivalent to 1000 pounds  
lambert  unit of brightness of light  
langley  unit of solar radiation  
league  unit of distance of between 2.4 and 4.6 miles  
link  unit of length used by surveyors, equal to 7.92 inches  
lumen  unit of luminous flux  
lux  unit of illumination equal to one lumen per square meter  
magneton  unit of the quantized magnetic moment of a particle  
maxwell  unit of magnetic flux  
mecate  old Mexican measure of about one-tenth of an acre  
megadeath  unit of fatality equal to one million deaths  
mho  unit of electrical conductance  
mil  unit of 1/1000 inch used for measuring thickness of wire  
minim  unit of liquid volume equal to 1/480 fluid ounces  
mnemon  unit of memory, largely hypothetical  
mole  unit of substance equal to number of atoms as 12 grams of carbon-12  
morgan  unit of inferred distance between genes on a chromosome  
morgen  unit of land area slightly more than two acres  
mutchkin  old unit of liquid measurement equal to 3/4 of an imperial pint  
nail  old measure of two and a quarter inches  
neper  unit for expressing ratio of two currents or voltages  
newton  unit of force that accelerates 1 kilogram to 1 meter / second / second  
oersted  unit of magnetic field strength  
ohm  unit of electrical resistance of circuits  
osmol  unit of osmotic pressure  
palm  unit of length equivalent to width or length of the hand  
parsec  unit of interstellar distance equal to 3.26 light-years  
pascal  unit of pressure equal to one newton per square meter  
peck  unit of dry measure equal to 8 quarts  
pennyweight  unit of troy weight equal to 24 grains  
phon  unit of loudness of sound as heard by listeners  
photon  unit of brightness of light as received at the retina  
pica  unit of typeface equal to about 1/6 of an inch  
pipe  unit of liquid capacity equal to two hogsheads  
pitch  unit of typeface equal to number of characters per inch  
point  unit of typeface equal to 1/72 of an inch  
poise  unit of viscosity of liquids  
pole  unit of area equal to a square rod  
pottle  unit of liquid measurement of two quarts, or one-half gallon  
poundal  unit of force that accelerates 1 pound to 1 foot / second / second  
probit  unit of measurement of statistical probability  
quad  unit of energy equal to one quadrillion British thermal units  
quarter  unit of weight equal to 28 pounds  
quintal  unit of weight equal to 100 kilograms  
quire  unit of 24 sheets of paper  
rad  unit of absorbed dose of ionizing radiation  
radian  unit of plane angular measurement, approximately 57.3 degrees  
rod  unit of length equal to 1/320 of a mile  
roentgen  unit of x-radiation or gamma radiation  
rood  old unit of land area equal to 1/4 acre  
rundlet  old liquid measure equal to about 15 gallons  
rutherford  unit of radioactive decay equal to 1 million disintegrations per second  
sabin  unit of acoustic absorption of one square foot of a perfect absorber  
scruple  unit of weight used by apothecaries equal to 1/24 of an ounce  
shake  unit of one hundred millionth of a second used to measure nuclear processes  
siemens  unit of electrical conductance equivalent to one ampere per volt  
slug  unit of gravitational mass of approximately 32.174 pounds  
sone  unit of loudness on a scale based on subjective or perceived loudness  
span  unit of distance equal to handspread or nine inches  
stack  old unit of measure for firewood equal to 108 cubic feet  
stone  unit of weight equal to 14 pounds  
svedberg  unit of time used to measure sedimentation velocity  
tesla  unit of magnetic flux density equal to one weber per square meter  
tex  unit of measurement of fineness of fibres and yarn  
therblig  unit of work for quantifying industrial operations  
therm  unit of quantity of heat equal to 100,000 British thermal units  
thirdendeal  old liquid measure of three pints; one-third of anything  
tod  old unit of weight of wool equal to 28 pounds  
tog  unit of measurement for insulation properties of fabric  
ton  unit of cooling power equal to 12,000 BTU per hour  
torr  unit of pressure equal to 1/760 of standard atmospheric pressure  
tun  unit of liquid capacity of 252 gallons  
vara  unit of linear measure of between 33 and 43 inches  
verst  unit of distance equal to approximately 2/3 of a mile  
virgate  old unit of land area usually equal to 30 acres or 1/4 hide  
volt  unit of electrical potential difference and electromotive force  
watt  unit of power equal to one joule per second  
weber  unit of magnetic flux equal to 100 million maxwells  
wey  old measure for dry goods usually equal to 40 bushels  
yardland  unit of land area equal to 30 acres  
yrneh  unit of reciprocal inductance  
 
Saturday, October 4, 2008
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