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English Dictionary

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 aphis lion aphis lion /'eɪfɪs ˈlaɪən/

noun

  1. Carnivorous larva of lacewing flies  ( aphid lion , aphis lion )
    carnivorous larva of lacewing flies


 gray gray /ˈgreɪ/

adjective

  1. () [American] Of an achromatic color of any lightness intermediate between the extremes of white and black  ( grayish [American] , greyish [Canadian, British] , grey [Canadian, British] , gray [American] )
    of an achromatic color of any lightness intermediate between the extremes of white and black
     The little grey cells
    the little grey cells
     Gray flannel suit
    gray flannel suit
     A man with greyish hair
    a man with greyish hair
  2. () [American] Showing characteristics of age, especially having grey or white hair  ( gray-headed [American] , grey [Canadian, British] , grey-haired [Canadian, British] , gray-haired [American] , grey-headed [Canadian, British] , grizzly , hoar , hoary , white-haired , gray [American] )
    showing characteristics of age, especially having grey or white hair
     Whose beard with age is hoar
    whose beard with age is hoar
     Nodded his hoary head
    nodded his hoary head
  3. () [American] Used to signify the Confederate forces in the American Civil War (who wore grey uniforms)  ( grey [Canadian, British] , gray [American] )
    used to signify the Confederate forces in the American Civil War (who wore grey uniforms)
     A stalwart grey figure
    a stalwart grey figure
  4. [American] Intermediate in character or position  ( gray [American] , grey [Canadian, British] )
    intermediate in character or position
     A grey area between clearly legal and strictly illegal
    a grey area between clearly legal and strictly illegal

noun

  1. () [American] A neutral achromatic color midway between white and black  ( grayness [American] , grey , greyness [Canadian, British] , gray [American] )
    a neutral achromatic color midway between white and black
     The artist mixed black and white paint to create a beautiful shade of grey for the background
    The artist mixed black and white paint to create a beautiful shade of grey for the background
  2. () Clothing that is a grey color  ( grey , gray )
    clothing that is a grey color
     He was dressed in grey
    he was dressed in grey
  3. () [American] Horse of a light gray or whitish color  ( grey , gray [American] )
    horse of a light gray or whitish color
     The gray horse, with its almost silver mane, was a stunning sight in the early morning light.
    The gray horse, with its almost silver mane, was a stunning sight in the early morning light.
  4. () [American] Any organization or party whose uniforms or badges are grey  ( grey , gray [American] )
    any organization or party whose uniforms or badges are grey
     The Confederate army was a vast grey
    the Confederate army was a vast grey
  5. [American] The SI unit of energy absorbed from ionizing radiation; equal to the absorption of one joule of radiation energy by one kilogram of matter; one gray equals 100 rad  ( gray [American] , Gy )
    the SI unit of energy absorbed from ionizing radiation; equal to the absorption of one joule of radiation energy by one kilogram of matter; one gray equals 100 rad

verb

  1. [American] Turn grey  ( gray [American] , grey [Canadian, British] )
    turn grey
     Her hair began to grey
    Her hair began to grey
  2. [American] Make grey  ( gray [American] , grey [Canadian, British] )
    make grey
     The painter decided to grey the sky
    The painter decided to grey the sky

 Gray

    noun

    1. United States botanist who specialized in North American flora and who was an early supporter of Darwin's theories of evolution (1810-1888)  ( Asa Gray , Gray )
      United States botanist who specialized in North American flora and who was an early supporter of Darwin's theories of evolution (1810-1888)
    2. American navigator who twice circumnavigated the globe and who discovered the Columbia River (1755-1806)  ( Gray , Robert Gray )
      American navigator who twice circumnavigated the globe and who discovered the Columbia River (1755-1806)
    3. English poet best known for his elegy written in a country churchyard (1716-1771)  ( Gray , Thomas Gray )
      English poet best known for his elegy written in a country churchyard (1716-1771)
    4. English radiobiologist in whose honor the gray (the SI unit of energy for the absorbed dose of radiation) was named (1905-1965)  ( Gray , Louis Harold Gray )
      English radiobiologist in whose honor the gray (the SI unit of energy for the absorbed dose of radiation) was named (1905-1965)


     derivative derivative /dɝˈɪvɪtɪv/

    adjective

    1. Resulting from or employing derivation  ( derivative )
      resulting from or employing derivation
       A derivative process
      a derivative process
       A highly derivative prose style
      a highly derivative prose style

    noun

    1. () The result of mathematical differentiation; the instantaneous change of one quantity relative to another; df(x)/dx  ( derived function , differential coefficient , first derivative , derivative , differential )
      the result of mathematical differentiation; the instantaneous change of one quantity relative to another; df(x)/dx
    2. (linguistics) a word that is derived from another word  ( derivative )
      (linguistics) a word that is derived from another word
       Electricity' is a derivative of electric'
      electricity' is a derivative of electric'
    3. (law) a financial instrument whose value is based on another security  ( derivative , derivative instrument )
      (law) a financial instrument whose value is based on another security
    4. A compound obtained from, or regarded as derived from, another compound  ( derivative )
      a compound obtained from, or regarded as derived from, another compound


     myxobacteria myxobacteria /ˌmaɪksoʊbækˈtɪriə/

    noun

    1. Bacteria that form colonies in self-produced slime; inhabit moist soils or decaying plant matter or animal waste  ( gliding bacteria , myxobacter , myxobacteria , myxobacterium , slime bacteria )
      bacteria that form colonies in self-produced slime; inhabit moist soils or decaying plant matter or animal waste