aughts

Etymology
From the sense of aught to refer to the number zero.

Noun

 * 1) The first decade of a century, such as 1900 to 1909 or 2000 to 2009, whose digit in the tens place is zero; the noughties.

Adjective

 * 1) From or evoking the first through tenth years of a century (chiefly the 2000s).
 * Dialup internet is so aughts.