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 very small piece of matter, a fragment; especially, the smallest possible part of something.
A part of speech which cannot be inflected.
A little bit.
Any of various physical objects making up the constituent parts of an atom; an elementary particle or subatomic particle.
A part of speech that has no inherent lexical definition but must be associated with another word to impart meaning, often a grammatical category: for example, the English word to in a full infinitive phrase (to eat) or O in a vocative phrase (O Canada), or as a discourse marker (mmm).
In the Roman Catholic church, a crumb of consecrated bread; also the smaller breads used in the communion of the laity.