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