grain in WordNet English dictionary

1. dry seed-like fruit produced by the cereal grasses: e.g. wheat, barley, Indian corn
   grain  caryopsis 
   
2. foodstuff prepared from the starchy grains of cereal grasses
   grain  food grain  cereal 
   
3. the direction, texture, or pattern of fibers found in wood or leather or stone or in a woven fabric
   "saw the board across the grain"
   grain 
   
4. the physical composition of something (especially with respect to the size and shape of the small constituents of a substance)
   "breadfruit has the same texture as bread"; "sand of a fine grain"; "fish with a delicate flavor and texture"; "a stone of coarse grain"
   texture  grain 
   
5. the smallest possible unit of anything
   "there was a grain of truth in what he said"; "he does not have a grain of sense"
   grain 
   
6. a relatively small granular particle of a substance
   "a grain of sand"; "a grain of sugar"
   grain 
   
7. a cereal grass
   "wheat is a grain that is grown in Kansas"
   grain 
   
8. 1/7000 pound; equals a troy grain or 64.799 milligrams
   grain 
   
9. 1/60 dram; equals an avoirdupois grain or 64.799 milligrams
   grain 
   
10. a weight unit used for pearls or diamonds: 50 mg or 1/4 carat
    grain  metric grain 
    
11. the side of leather from which the hair has been removed
    grain 
    

1. form into grains
   granulate  grain 
   
2. become granular
   granulate  grain 
   
3. thoroughly work in
   "His hands were grained with dirt"
   ingrain  grain 
   
4. paint (a surface) to make it look like stone or wood
   grain