a minute arachnid, of the order acarina, of which there are many species; as, the cheese mite, sugar mite, harvest mite, etc. see acarina.-a small coin formerly circulated in england, rated at about a third of a farthing. the name is also applied to a small coin used in palestine in the time of christ.-a small weight; one twentieth of a grain.-anything very small; a minute object; a very little quantity or particle.