Tadpole

noun

1. A young toad or frog in its larval stage of development that lives in water, has a tail and no legs, and, like a fish, breathes through gills.
2. (by extension) The aquatic larva of any amphibian.

   "salamander tadpole"

3. A type of cargo bike that has two wheels in front and one in back.
4. A child's basic drawing of a human being, having a detailed head but only sticks for the body and limbs.