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

mygale \myg"ale\, prop. n. l., a field mouse, gr. ?. zool.
   a genus of very large hairy spiders of the family
   ctenizidae, having four lungs and only four spinnerets.
   they do not spin webs, but usually construct tubes in the
   earth, which are often furnished with a trapdoor. the south
   american bird spider mygale avicularia, and the crab
   spider, or matoutou mygale cancerides are among the
   largest species. they are also called trapdoor spiders.
   some of the species are erroneously called tarantulas, as the
   texas tarantula mygale hentzii.
   1913 webster +pjc
see also:
ctenizidae mygale avicularia mygale cancerides trapdoor spiders mygale hentzii 

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

bird \bird\ b~erd, n. oe. brid, bred, bird, young bird,
   bird, as. bridd young bird. root92.
   1. orig., a chicken; the young of a fowl; a young eaglet; a
      nestling; and hence, a feathered flying animal see 2.
      1913 webster

            that ungentle gull, the cuckoo's bird. --shak.
      1913 webster

            the brydds birds of the aier have nestes.
                                                  --tyndale
                                                  matt. viii.
                                                  20.
      1913 webster

   2. zool. a warm-blooded, feathered vertebrate provided with
      wings. see aves.
      1913 webster

   3. specifically, among sportsmen, a game bird.
      1913 webster

   4. fig.: a girl; a maiden.
      1913 webster

            and by my word the bonny bird
            in danger shall not tarry.            --campbell.
      1913 webster

   arabian bird, the phenix.

   bird of jove, the eagle.

   bird of juno, the peacock.

   bird louse zool., a wingless insect of the group
      mallophaga, of which the genera and species are very
      numerous and mostly parasitic upon birds. -- bird mite
      zool., a small mite genera dermanyssus,
      dermaleichus and allies parasitic upon birds. the
      species are numerous.

   bird of passage, a migratory bird.

   bird spider zool., a very large south american spider
      mygale avicularia. it is said sometimes to capture and
      kill small birds.

   bird tick zool., a dipterous insect parasitic upon birds
      genus ornithomyia, and allies, usually winged.
      1913 webster
see also:
aves arabian bird bird of jove bird of juno bird louse dermanyssus 
dermaleichus bird of passage bird spider mygale avicularia bird tick 
ornithomyia 

Mygale >> M Words
Mygale, definition of term: Mygale
mygale_pag1.html

Avicularia >> A Words
Avicularia, definition of term: Avicularia
avicularia_pag1.html