Real Dictionary

mite
Mites are very tiny creatures that live on plants, for example, or in animals' fur.

mite in American English 1
any of a large subclass (Acari) of tiny, sometimes microscopic, arachnids often parasitic upon animals, insects, or plants, or infesting prepared foods, including many species that transmit diseases
noun: any of numerous small to microscopic arachnids of the subclass Acari, including species that are parasitic on animals and plants or that feed on decaying matter and stored foods

mite in American English 2
a very small sum of money or contribution
adverb: to a small extent; somewhat
noun: a contribution that is small but is all that a person can afford

mite in British English 1
noun: any of numerous small free-living or parasitic arachnids of the order Acarina (or Acari) that can occur in terrestrial or aquatic habitats

mite in British English 2
noun: a very small particle, creature, or object