snakehead \snake"head`\, n.
   1. a loose, bent-up end of one of the strap rails, or flat
      rails, formerly used on american railroads. it was
      sometimes so bent by the passage of a train as to slip
      over a wheel and pierce the bottom of a car.
      1913 webster

   2. bot.
      a the turtlehead.
      b the guinea-hen flower. see snake's-head, and under
          guinea.
          1913 webster
see also:
snake's-head guinea 

turtlehead \tur"tlehead`\ t^ur"t'l-he^d`, n. bot.
   an american perennial herb chelone glabra having white
   flowers shaped like the head of a turtle. called also
   snakehead, shell flower, and balmony.
   1913 webster
see also:
chelone glabra snakehead shell flower balmony 

chelone \chelo"ne\, n. gr. chelw`nh a tortoise. so named from
   shape of the upper lip of the corolla. bot.
   a genus of hardy perennial flowering plants, of the order
   scrophulariaceae, natives of north america; -- called
   also snakehead, turtlehead, shellflower, etc.
   1913 webster
see also:
scrophulariaceae snakehead turtlehead shellflower 

snake-head
     n : showy perennial of marshlands of eastern and central north
         america having waxy lanceolate leaves and flower with
         lower part creamy white and upper parts pale pink to deep
         purple syn: shellflower, shell-flower, turtlehead,
          snakehead, chelone glabra
see also:
shellflower shell-flower turtlehead snakehead chelone glabra 

snakehead
     n : showy perennial of marshlands of eastern and central north
         america having waxy lanceolate leaves and flower with
         lower part creamy white and upper parts pale pink to deep
         purple syn: shellflower, shell-flower, turtlehead,
          snake-head, chelone glabra
see also:
shellflower shell-flower turtlehead snake-head chelone glabra