T-shirt Definition
tēzhʉrt
noun
A collarless, cotton undershirt with short sleeves.
Webster's New World
A similar pullover knit sport shirt.
Webster's New World
Alternative spelling of T-shirt.
Wiktionary
Other Word Forms of T-shirt
Noun
Singular:
T-shirt
Plural:
t-shirtsOrigin of T-shirt
Perhaps from its being shaped like the letter T when spread out
From American Heritage Dictionary of the English Language, 5th Edition
From its shape.
From Wiktionary