The study of the microscopic structure, chemical composition and function of the tissue or tissue systems of plants and animals.
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.
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.
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.
A collection or number of different things.
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.