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

spavin \spav"in\, n. oe. spaveyne, of. esparvain, f.
   'eparvin; akin to of. espervier a sparrow hawk, f.
   'epervier, fr. ohg. sparw=ari g. sperber, fr. ohg.
   sparo sparrow, because this disease makes the horse raise the
   infirm leg in the manner of a sparrow hawk or sparrow. see
   sparrow. far.
   a disease of horses characterized by a bony swelling
   developed on the hock as the result of inflammation of the
   bones; also, the swelling itself. the resulting lameness is
   due to the inflammation, and not the bony tumor as popularly
   supposed. --harbaugh.
   1913 webster

   bog spavin, a soft swelling produced by distention of the
      capsular ligament of the hock; -- called also blood
      spavin.

   bone spavin, spavin attended with exostosis; ordinary
      spavin.
      1913 webster
see also:
sparrow bog spavin blood spavin bone spavin 

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

bog \bog\ bo^g, n. ir.  gael. bog soft, tender, moist: cf.
   ir. bogach bog, moor, marsh, gael. bogan quagmire.
   1913 webster
   1. a quagmire filled with decayed moss and other vegetable
      matter; wet spongy ground where a heavy body is apt to
      sink; a marsh; a morass.
      1913 webster

            appalled with thoughts of bog, or caverned pit,
            of treacherous earth, subsiding where they tread.
                                                  --r. jago.
      1913 webster

   2. a little elevated spot or clump of earth, roots, and
      grass, in a marsh or swamp. local, u. s.
      1913 webster

   bog bean. see buck bean.

   bog bumper bump, to make a loud noise, bog blitter,
   bog bluiter, bog jumper, the bittern. prov.

   bog butter, a hydrocarbon of butterlike consistence found
      in the peat bogs of ireland.

   bog earth min., a soil composed for the most part of
      silex and partially decomposed vegetable fiber. --p. cyc.

   bog moss. bot. same as sphagnum.

   bog myrtle bot., the sweet gale.

   bog ore. min.
      a an ore of iron found in boggy or swampy land; a
          variety of brown iron ore, or limonite.
      b bog manganese, the hydrated peroxide of manganese.

   bog rush bot., any rush growing in bogs; saw grass.

   bog spavin. see under spavin.
      1913 webster
see also:
bog bean buck bean bog bumper bog blitter bog bluiter bog jumper 
bog butter bog earth bog moss sphagnum bog myrtle 
bog ore bog rush bog spavin spavin 

[3] : WordNet (r) 2.0

bog spavin
     n : spavin caused by collection of fluids

Bog >> B Words
Bog, definition of term: Bog
bog_pag1.html

Peat Bog >> P Words
Peat Bog, definition of term: Peat Bog
peat+bog_pag1.html