I blogged about this quite sometime back, since then, Zdic has grown. Now you can use this versatile Chinese dictionary on your mobile and palm. Just point your URL to wap.zdic.net.
Zdic is a online Chinese dictionary which packs 70 thousand Chinese words, with explicit explanation for each word, their origin and history. It also tells you the different style of each word. You cannot find another better online Chinese Dictionary.
(Link)Zdic, now mobile.
Previously on 南洋之子, Kick-ass online Chinese Dictionary.