2-D
2D
2-dimethylaminoethanol
2-ethylhexyl
2-handed
2-hydroxyadipaldehyde
2-hydroxyethyl
2-methyl-1-butanol
2-methyl-1-pentene
2-n-hexyl-2-cyclopentene-1-one
  2-nitropropane
2-propylene
2T
2-trichloro-1
2'-trifluoroethane
360-degree
3-axis
3-butylene
3-D
3D
3-dimension