• d (deci) = 0.1 (prefix)
• D (deka) = 10 (prefix)
• d = day (time)
• da (deka) = 10 (prefix)
• dalton = AMU (mass)
• damping viscosity = mass flow rate (mass flow rate)
• Data
  • b = byte
  • bit = bit (base unit)
  • byte = 8 bit
  • char = byte
  • character = byte
  • data = byte (category unit)
  • gb = gigabyte
  • gigabyte = 1024 megabyte
  • kb = kilobyte
  • kilobyte = 1024 byte
  • mb = megabyte
  • megabyte = 1024 kilobyte
  • nibble = 0.5 byte
  • tb = terabyte
  • terabyte = 1024 gigabyte
• data = byte (data; category unit)
• Data Flow Rate
  • baud = 0.1 byte/s
  • bps (bits per second) = 0.1 byte/s
  • cps (characters per second) = byte/s (derived unit)
  • data flow rate = byte/s (category unit)
• data flow rate = byte/s (data flow rate; category unit)
• day = 24 hour (time)
• dC (Celsius degree) = K (thermodynamic temperature)
• deadweight ton = long ton (mass)
• dec = 10 (prefix)
• decade = 10 yr (time)
• deci = 0.1 (prefix)
• decillion = 1E+33 (prefix)
• decimilli = 0.0001 (prefix)
• deg = degree (plane angle)
• degree (Pi rad / 180) = 1.74532925199433E-02 rad (plane angle)
• deka = 10 (prefix)
• demi = 0.5 (prefix)
• denarius (Roman denarius) = 60 grain (mass)
• density = mass density (mass density)
• Density Of States
  • density of states = 1/J*m^3 (category unit)
• density of states = 1/J*m^3 (density of states; category unit)
• Density Of Vibrational Modes
  • density of vibrational modes = s/m^3 (category unit)
• density of vibrational modes = s/m^3 (density of vibrational modes; category unit)
• depth = length (length)
• desyatina (Russian desyatina) = 2.7 acre (area)
• dF (Fahrenheit degree) = 0.555555555555556 K (thermodynamic temperature)
• dialectric permittivity = permittivity (permittivity)
• dialectric polarization = electric flux density (electric flux density)
• dialectric strength = permittivity (permittivity)
• diffusivity = kinematic viscosity (kinematic viscosity)
• digitus (Roman digitus) = 0.73 in (length)
• Dimensionless Unit
  • % (percent) = 0.01
  • bakers dozen = 13
  • basis point = 0.01 percent
  • bundle (of paper) = 2 ream
  • case (of paper) = 4 bundle
  • concentration mass to mass = dimensionless unit
  • concentration volume to volume = dimensionless unit
  • cooling duty = dimensionless unit
  • dimensionless unit = 1 (category unit)
  • dozen = 12
  • dry = 1.16364718614719 approx
  • googol = 1E+100
  • great gross = 12 gross
  • gross = 12 dozen
  • karat = 4.16666666666667E-02
  • length to length = dimensionless unit
  • mass to mass concentration = dimensionless unit
  • percent = 0.01
  • pi = 3.14159265358979
  • proof = 0.005
  • quire (of paper) = 25
  • ream (of paper) = 20 quire
  • score = 20
  • scotch = 86 proof
  • UK (British) = 1.000002
  • UK caliber (British caliber) = 0.001
  • volume to volume concentration = dimensionless unit
• dimensionless unit = 1 (category unit)
• dinar (Arabian dinar) = 4.2 gram (mass)
• diopter (lens power) = 1/m (wave number; derived unit)
• displacement = electric flux density (electric flux density)
• displacement ton = 35 ft^3 (volume)
• diurnal = day (time)
• dK = K (thermodynamic temperature)
• dm (decimilli) = 0.0001 (prefix)
• dollar = $ (currency)
• doppelzentner = 100 kg (mass)
• Dose Equiv
  • rem = 0.01 Sv
  • sievert = m^2/s^2 (derived unit)
  • Sv = sievert
• dose equiv = specific energy (specific energy)
• double = 2 (prefix)
• dozen = 12
• dR (Rankine degree) = 0.555555555555556 K (thermodynamic temperature)
• dr = dram (mass)
• dr ap = dram ap (mass)
• dr fl = dram fluid (volume)
• dr fluid = dram fluid (volume)
• dr t = dram troy (mass)
• drachma2 (Greek drachma) = 4.2923 gram (mass)
• draft = pressure (pressure)
• dram (avoirdupois dram) = 0.0625 oz (mass)
• dram ap (apothecary dram) = 3 scruple (mass)
• dram fl = dram fluid (volume)
• dram fluid (fluid dram) = 0.125 oz fluid (volume)
• dram troy (troy dram) = 60 grain (mass)
• dRe (Reaumur degree) = 1.25 K (thermodynamic temperature)
• drop = 0.03 cm^3 (volume)
• dry = 1.16364718614719 approx
• dry barrel = 7056 in^3 (volume)
• dry gallon = 268.8025 in^3*approx (volume)
• dry pint = 0.5 dry quart (volume)
• dry quart = 0.25 dry gallon (volume)
• duodec = 12 (prefix)
• dw t = pennyweight troy (mass)
• dyn = dyne (force)
• Dynamic Viscosity
  • absolute viscosity = dynamic viscosity
  • dynamic viscosity = Pa*s (category unit)
  • flow rate to length mass basis = dynamic viscosity
  • mass basis flow rate to length = dynamic viscosity
  • P = poise
  • poise = gram/cm*s (derived unit)
  • reyn = lbf*s/in^2 (derived unit)
  • viscosity absolute = dynamic viscosity
  • viscosity dynamic = dynamic viscosity
• dynamic viscosity = Pa*s (dynamic viscosity; category unit)
• dyne (cm*gm/s^2) = 0.00001 N (force)

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