catflap.org Online Dictionary Query

  Methylene \Meth"yl*ene\, n. [F. m['e]thyl[`e]ne, from Gr. ? wine
     + ? wood; -- a word coined to correspond to the name wood
     spirit.] (Chem.)
     A divalent hydrocarbon radical, -CH2-, not known in the
     free state, but regarded as an essential residue and
     component of certain derivatives of methane; as, methylene
     bromide, CH2Br2; -- formerly called also methene.
     [1913 Webster]
  
     Methylene blue (Chem.), an artificial dyestuff consisting
        of a complex sulphur derivative of diphenyl amine; --
        called also pure blue.
        [1913 Webster]

  Methylene \Meth"yl*ene\, n. [F. m['e]thyl[`e]ne, from Gr. ? wine
     + ? wood; -- a word coined to correspond to the name wood
     spirit.] (Chem.)
     A hydrocarbon radical, CH2, not known in the free state,
     but regarded as an essential residue and component of certain
     derivatives of methane; as, methylene bromide, CH2Br2; --
     formerly called also methene.
  
     Methylene blue (Chem.), an artificial dyestuff consisting
        of a complex sulphur derivative of diphenyl amine; --
        called also pure blue.

  methylene
       n : the bivalent radical CH2 derived from methane [syn: methylene
           group, methylene radical]

  methylene
     n.
     1 (lb en organic chemistry) The divalent group
  CH<sub>2</sub>< in which the free valencies are part of
  single bonds.
     2 (lb en organic chemistry) The same group, present as a repeating
  unit, in aliphatic compounds with names such as hexamethylenediamine.
     3 (lb en organic chemistry) The unstable carbene
  CH<sub>2</sub>:

  methylene
     n.
     1 (lb en organic chemistry) The divalent group
  CH<sub>2</sub>< in which the free valencies are part of
  single bonds.
     2 (lb en organic chemistry) The same group, present as a repeating
  unit, in aliphatic compounds with names such as hexamethylenediamine.
     3 (lb en organic chemistry) The unstable carbene
  CH<sub>2</sub>:

  methylene
     n.
     1 (lb en organic chemistry) The divalent group
  CH<sub>2</sub>< in which the free valencies are part of
  single bonds.
     2 (lb en organic chemistry) The same group, present as a repeating
  unit, in aliphatic compounds with names such as hexamethylenediamine.
     3 (lb en organic chemistry) The unstable carbene
  CH<sub>2</sub>:

  methylene
     n.
     1 (lb en organic chemistry) The divalent group
  CH<sub>2</sub>< in which the free valencies are part of
  single bonds.
     2 (lb en organic chemistry) The same group, present as a repeating
  unit, in aliphatic compounds with names such as hexamethylenediamine.
     3 (lb en organic chemistry) The unstable carbene
  CH<sub>2</sub>:

  Methylene /mˈɛθɪlˌiːn/
  الميثيلين: جذر هيدروكربوني ثنائيّ

  methylene /mˈɛθɪlˌiːn/
  methylen

  methylene /mˈɛθɪlˌiːn/ 
  metylén

  methylene /mˈɛθɪlˌiːn/
  
  μεθυλένιον

  methylene /mˈɛθɪlˌiːn/ 
  metyleeni
  divalent radical

  methylene /mˈɛθɪlˌiːn/
  metilén-gyök

  
/ˈmɛθɪˌɫin/

  n. 次甲基;

     n. 亚甲基