pollywog
noun
pol·ly·wog ˈpä-lē-ˌwäg 
-ˌwȯg
variants or polliwog
: tadpole
Word History
Etymology
alteration of Middle English polwygle, probably from pol poll + wiglen to wiggle
First Known Use
1838, in the meaning defined above
Kids Definition
pollywog
noun
pol·ly·wog
variants or polliwog
ˈpä-lē-ˌwäg
: tadpole