Main Entry: tad·pole
Pronunciation: \ˈtad-ˌpōl\
Function: noun
Etymology: Middle English taddepol, from tode toad + polle head
Date: 15th century
: a larval amphibian; specifically : a frog or toad larva that has a rounded body with a long tail bordered by fins and external gills soon replaced by internal gills and that undergoes a metamorphosis to the adult