tadpole (n.)Related entries & more
tad (n.)Related entries & more
1877, "young or small child," probably a shortened form of tadpole, which is said to be the source of Tad as the nickname of U.S. President Lincoln's son Thomas (1853–1871). The extended meaning "small amount" is first recorded 1915.
polliwog (n.)Related entries & more
Bufo (n.)Related entries & more
toad genus, from Latin bufo "a toad," an Osco-Umbrian loan-word, perhaps from PIE *gwebh-, a root denoting sliminess and also forming words for "frog" (source also of Old Prussian gabawo "toad," Old Church Slavonic žaba "frog," Middle Low German kwappe "tadpole," German Quappe).