See Also: frog(3)(dictionary)
Frog(medicine)
frog(encyclopedia)
frog(1)(dictionary)
frog(2)(dictionary)
frog(dictionary)
frog(4)(dictionary)
tree frog(encyclopedia)
leap-frog(2)(dictionary)
leap-frog(1)(dictionary)

frog(4) (iou)



frog noun4. M19.
[Origin unkn.]
A grooved piece of metal placed at the junction of the rails where one railway track crosses another.