A grouping of a number of similar things.
The undesirable contiguous grouping of elements in a hash table.
A prewriting technique consisting of writing ideas down on a sheet of paper around a central idea within a circle, with the related ideas radially joined to the circle using rays.
The grouping of a population based on ethnicity, economics or religion.
Forming a cluster.
A collection or number of different things.
A rank in a taxonomic classification below species and (if present) subspecies, and above form; hence, an organism of that rank.
The total number of distinct states of a system; also, the logarithm to the base 2 of the total number of distinct states of a system.
An animal or plant (or a group of such animals or plants) with characteristics causing it to differ from other animals or plants of the same species; a cultivar.
In universal algebra: an equational class; the class of all algebraic structures of a given signature, satisfying a given set of identities.
A specific form of a language, neutral to whether that form is an accent, dialect, register, etc., and to its prestige level; an isolect or lect.
The kind of entertainment given in variety performances or shows; also, the production of, or performance in, variety performances or shows.
A deviation or difference.
A stamp, or set of stamps, which has one or more characteristics (such as colour, paper, etc.) differing from other stamps in the same issue, especially if such differences are intentionally introduced.
The quality of being varied; diversity.
A specific variation of something.