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.
not a tad of difference
a tad too expensive
tactician
tactics
tactile
tactless
tactual
tad
tadpole
tae
tae kwon do
taedium vitae
taffeta
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