Anything very small; a minute object; a very little quantity or particle.
A lepton, a small coin used in Palestine in the time of Christ.
A small coin formerly circulated in England, rated at about a third of a farthing.
A small weight; one twentieth of a grain.
Any of many minute arachnids which, along with the ticks, comprise subclass Acarina (aka Acari).
A small or naughty person, or one people take pity on; rascal.
A small or trace amount.
A small spark or flash.