G in WordNet English dictionary

1. the cardinal number that is the product of 10 and 100
   thousand  one thousand  1000  M  K  chiliad  G  grand  thou  yard 
   
2. (physics) the universal constant relating force to mass and distance in Newton's law of gravitation
   gravitational constant  universal gravitational constant  constant of gravitation  G 
   
3. one of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose)
   deoxyguanosine monophosphate  G 
   
4. the 7th letter of the Roman alphabet
   G  g 
   
5. a unit of information equal to 1024 mebibytes or 2^30 (1,073,741,824) bytes
   gigabyte  gibibyte  G  GB  GiB 
   
6. a unit of information equal to 1000 megabytes or 10^9 (1,000,000,000) bytes
   gigabyte  G  GB 
   
7. a purine base found in DNA and RNA; pairs with cytosine
   guanine  G 
   
8. the 7th letter of the Roman alphabet
   G  g 
   

G in Webster's English dictionary