mite 2 
(mīt)
(mīt)n.
Idiom: 1.
a. A very small contribution or amount of money.
b. A widow's mite.
2. A very small object, creature, or particle.
3. A coin of very small value, especially an obsolete British coin worth half a farthing.
a mite
To a small degree; somewhat: That remark was a mite unfair.
[Middle English, from Middle Dutch and Middle Low German mīte, a small Flemish coin, tiny animal.]