Bitcoin Dust

[sunny1356]

I am not sure there is an exact definition of dust...
Sending less than 0.01 BTC to any recipient — The network considers these small outputs to be “dust,” and discourages them by requiring a fee. If it was not discouraged, someone could take 1.0 BTC, and create 1,000,000 transactions of 0.000001 BTC each, for free, which would clog the network. So, that's one definition of dust.

[jacafbiz]

This topic should be moved to Bitcoin discussion for better attention to your question, this is ALtcoin section