出典:Wiktionary
Abbreviated from "year 2000", with "K" standing for 1000, as in the prefix kilo- though capital K as a prefix is often used as x1024. The correct S.I. Prefix is lowercase k.
Y2K (uncountable)
出典:Wikipedia
●注意
お探しになった「Y2K」は、Weblio英和辞典にはまだ収録されていませんが、「Y2K」に近い「Year 2000 problem」について、『ウィキペディア英語版』からの引用を下記に表示しています。
出典:『Wikipedia』 (2011/08/07 23:20 UTC 版)
The Year 2000 problem (also known as the Y2K problem, the Millennium bug, the Y2K bug, or simply Y2K) was a problem for both digital (computer-related) and non-digital documentation and data storage situations which resulted from the practice of abbreviating a four-digit year to two digits.
その2
uj
Two years old.
a dot written beside a Japanese character in order to modify the pronunciation
both
the period of time during which a human being grows up and has a child born, called generation
あと2つ
2 more
二又になる
Two times worth.