Machinery's Handbook, 31st Edition
Measuring Units
2827
SYMBOLS AND ABBREVIATIONS Greek Letters and Standard Abbreviations The Greek letters are frequently used in mathematical expressions and formulas. The Greek alphabet is given below. A α Alpha H η Eta N ν Nu T τ Tau B β Beta Θ θ ϑ Theta Ξ ξ Xi ϒ υ Upsilon Γ γ Gamma I ι Iota O o Omicron Φ φ Phi Δ δ Delta K κ Kappa Π π Pi X χ Chi E ε Epsilon Λ λ Lambda R ρ Rho Ψ ψ Psi Z ζ Zeta M μ Mu Σ σ ς Sigma Ω ω Omega Abbreviations for Scientific and Engineering Terms ANSI/ASME Y14.38-2007 (R2013) Absolute abs Decibel dB Alternating current ac Degree deg or ° Ampere amp Degree Centigrade ° C Ampere-hour amp hr Degree Fahrenheit ° F Angstrom unit Å Degree Kelvin K Antilogarithm antilog Diameter dia Arithmetical average aa Direct current dc Atmosphere atm Dozen doz Atomic weight at wt Dram dr Avoirdupois avdp Efficiency eff Barometer baro Electric elec Board-foot (foot board measure) fbm Electromotive force emf Boiler pressure bopress Elevation el Boiling point bp Engine eng Brinell Hardness Number BHN or HB Engineer engr British thermal unit Btu or B Engineering engrg Bushel bu Equation eq Calorie cal External ext Candle cd Fluid fl Center to center c to c Foot ft Centimeter cm Foot-candle fc Centimeter-gram-second (system) cgs Foot-lambert fL or fl Chemical chem Foot per minute fpm Chemically pure cp Foot per second fps Circular circ Foot-pound ft-lb Circular mil cmil Foot-pound-second (system) fps Coefficient coef Free on board fob Cologarithm colog Freezing point fp Concentrate conc Frequency freq Conductivity cndct Fusion point fnpt Constant const Gallon gal Cord cd Gallon per minute gpm Cosecant csc Gallon per second gps Cosine cos Grain gr Cost, insurance, and freight cif Gram g Cotangent ctn Greatest common divisor gcd Counter electromotive force cemf High pressure hp Cubic cu Horsepower hp Cubic centimeter cm 3 or cc Horsepower-hour hp-hr Cubic foot ft 3 or cu ft Hour h or hr Cubic feet per second ft 3 or cfs Hyperbolic cosine cosh Cubic inch in 3 or cu in Hyperbolic sine sinh Cubic meter m 3 or cu m Hyperbolic tangent tanh Cubic millimeter mm 3 or cumm Inch in Cubic yard yd 3 or cu yd Inch per second in/s or ips Current density cd Inch-pound in-lb Cylinder cyl
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