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

scorpion \scor"pion\, n. f., fr. l. scorpio, scorpius, gr. ?,
   perhaps akin to e. sharp.
   1. zool. any one of numerous species of pulmonate arachnids
      of the order scorpiones, having a suctorial mouth, large
      claw-bearing palpi, and a caudal sting.
      1913 webster

   note: scorpions have a flattened body, and a long, slender
         post-abdomen formed of six movable segments, the last
         of which terminates in a curved venomous sting. the
         venom causes great pain, but is unattended either with
         redness or swelling, except in the axillary or inguinal
         glands, when an extremity is affected. it is seldom if
         ever destructive of life. scorpions are found widely
         dispersed in the warm climates of both the old and new
         worlds.
         1913 webster

   2. zool. the pine or gray lizard sceloporus undulatus.
      local, u. s.
      1913 webster

   3. zool. the scorpene.
      1913 webster

   4. script. a painful scourge.
      1913 webster

            my father hath chastised you with whips, but i will
            chastise you with scorpions.          --1 kings xii.
                                                  11.
      1913 webster

   5. astron. a sign and constellation. see scorpio.
      1913 webster

   6. antiq. an ancient military engine for hurling stones and
      other missiles.
      1913 webster

   book scorpion. zool. see under book.

   false scorpion. zool. see under false, and book
      scorpion.

   scorpion bug, or water scorpion zool. see nepa.

   scorpion fly zool., a neuropterous insect of the genus
      panorpa. see panorpid.

   scorpion grass bot., a plant of the genus myosotis.
      myosotis palustris is the forget-me-not.

   scorpion senna bot., a yellow-flowered leguminous shrub
      coronilla emerus having a slender joined pod, like a
      scorpion's tail. the leaves are said to yield a dye like
      indigo, and to be used sometimes to adulterate senna.

   scorpion shell zool., any shell of the genus pteroceras.
      see pteroceras.

   scorpion spiders. zool., any one of the pedipalpi.

   scorpion's tail bot., any plant of the leguminous genus
      scorpiurus, herbs with a circinately coiled pod; -- also
      called caterpillar.

   scorpion's thorn bot., a thorny leguminous plant
      genista scorpius of southern europe.

   the scorpion's heart astron., the star antares in the
      constellation scorpio.
      1913 webster
see also:
scorpiones sceloporus undulatus scorpio book scorpion book false scorpion 
false book scorpion scorpion bug water scorpion nepa 
scorpion fly panorpa panorpid scorpion grass myosotis 
myosotis palustris forget-me-not scorpion senna coronilla emerus scorpion shell 
pteroceras scorpion spiders scorpion's tail scorpiurus caterpillar 
scorpion's thorn genista scorpius the scorpion's heart 

[2] : WordNet (r) 2.0

scorpion fly
     n : any of various mecopterous insects of the family panorpidae
         of the northern hemisphere having a long beak and long
         antennae; males have a tail like that of a scorpion
         except it is not venomous

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