(zoology) In zoological nomenclature, a name which is formally published, but which had already been used for another taxon; this second use is invalid (as are all subsequent uses) and the name must be replaced.

plural of naming convention

A collection of rules followed by a set of names which allow users to deduce useful information, based on the names' character sequence and knowledge of the rules followed; such as Manhattan's East-West streets being called "Streets" and its North-South streets being called "Avenues".

(informal) famous or celebrated; well-known.

(idiomatic, almost always preceded by the, informal) The essential element (needed to reach the principal goal or objective); the overall purpose.

(Christianity) A catch phrase of the Christian Word of Faith movement, a statement of faith and affirmation.

A brand name that is well known to the great majority of households. / A genericized trademark. / A very well-known public figure.

(botany) a formal scientific name of a plant, especially as conforming to the ICBN.

a name, especially a surname such as Smith or Taylor, that is derived from an occupation - presumably the occupation of a distant ancestor

(taxonomy) The scientific name of a genus. / (pharmacology, pharmacy) The name given to a drug that is used to identify it irrespective of trademark etc.