[1] : The Collaborative International Dictionary of English v.0.48

thorn \thorn\, n. as. thornorn; akin to os.  ofries. thorn,
   d. doorn, g. dorn, dan. torn, sw. t"orne, icel. thornorn,
   goth. thorna'urnus; cf. pol. tarn, russ. tern' the
   blackthorn, ternie thorns, skr. t.r.na grass, blade of
   grass. root53.
   1. a hard and sharp-pointed projection from a woody stem;
      usually, a branch so transformed; a spine.
      1913 webster

   2. bot. any shrub or small tree which bears thorns;
      especially, any species of the genus crataegus, as the
      hawthorn, whitethorn, cockspur thorn.
      1913 webster

   3. fig.: that which pricks or annoys as a thorn; anything
      troublesome; trouble; care.
      1913 webster

            there was given to me a thorn in the flesh, the
            messenger of satan to buffet me.      --2 cor. xii.
                                                  7.
      1913 webster

            the guilt of empire, all its thorns and cares,
            be only mine.                         --southern.
      1913 webster

   4. the name of the anglo-saxon letter ?, capital form ?. it
      was used to represent both of the sounds of english th, as
      in thin, then. so called because it was the initial letter
      of thorn, a spine.
      1913 webster

   thorn apple bot., jamestown weed.

   thorn broom bot., a shrub that produces thorns.

   thorn hedge, a hedge of thorn-bearing trees or bushes.

   thorn devil. zool. see moloch, 2.

   thorn hopper zool., a tree hopper thelia crataegi
      which lives on the thorn bush, apple tree, and allied
      trees.
      1913 webster
see also:
thorn apple thorn broom thorn hedge thorn devil moloch thorn hopper 
thelia crataegi 

Devil >> D Words
Devil, definition of term: Devil
devil_pag1.html

Devil Ray >> D Words
Devil Ray, definition of term: Devil Ray
devil+ray_pag1.html

Devil Dog >> D Words
Devil Dog, definition of term: Devil Dog
devil+dog_pag1.html