acronym a word formed from the initial letters or syllables taken from a group of words that form the name of a company, product, process, etc. —acronymic, acronymous, adj. agnomen Ancient Rome. an additional name, usually given in honor of some signal achievement; hence, a nickname. —agnominal, adj. allonymy a name of one person used by another, such as a writer using the name of someone other than himself for concealment of identity or other purpose. Cf. pseudonym. —allonymous, adj. anthroponymy a branch of onomastics that studies personal names. —anthroponymist, n. antonomasia 1. the use of an epithet or appellative for an individual’s name, as his excellency. 2. the use of a proper name to express a general idea or to designate others sharing a particular characteristic, as a Rockefeïler. —antonomastic, adj. biosystematics biosystematy. —biosystematic, biosystematical, adj. biosystematy the science of the classification of living things. Also biosystematics. —biosystematic, biosystematical, adj. caconymic pertaining to a bad or objectionable name. cognomen 1. Ancient Rome. the third and usually last name in Roman personal names, as Caesar of Gaius Julius Caesar. 2. a surname or family name. 3. a nickname. —cognominal. adj. cryptonym a secret name. eponym 1. the name of a real or legendary person that has been applied to a thing, institution, etc, as atlas. 2. the name of a person that is used to describe a time or period, as the Augustan Age. —eponymic, eponymous, adj. eponymism the derivation of names for tribes, nations, or places, from that of a person, whether real or imaginary. Also eponymy. —eponymous, eponymic, adj. eponymist a real or legendary person whose name has been used as an eponym. euonym a name that is apt or fitting. filionymic Rare. a name derived from that of a son. hypocorism 1. the creation or use of pet names, as Dick for Richard. 2. a pet name. 3. baby talk. —hypocoristic, adj. matronymic metronymic. metonymy a rhetorical or stylistic device in which one thing is named or referred to by the name of another, related thing; for example, the use of White House in referring to the presidential administration. —metonym, n. —metonymous, metonymie, metonymical, adj. metronymic, matronymic a name derived from a mother or a female ancestor. Cf. patronymic. nomancy onomancy. nomenclature 1. a system of names used in the classification of an art or science or other field or subject. 2. a naming system peculiar to a social group. See also books; classification; language; nature. onomancy, onomomancy a form of divination involving the letters of a name. Also called nomancy. onomasticon a dictionary of proper names. —onomastic, adj. onomastics onomatology. —onomastician, n. —onomastic, adj. onomatology the science or study of the origin and forms of proper names. Also called onomastics. —onomatologist, n. —onomatological, adj. onomatomania a preoccupation with words or names. onomatophobia an abnormal fear of a certain name or word. onym Biology. a technical name, as one that forms part of a system of nomenclature or classification. onymy the application of onyms; classification or systematic nomenclature. organonymy the nomenclature of organs. —organonymal. organonymic, adj. paedonymic a name derived from one’s child. patronomatology Rare. the tracing of the origins of personal names. patronymic a name derived from a father or paternal ancestor. Cf. metronymic. poecilonymy the simultaneous use of several names or synonyms for one thing. polyonymy the use of various names for one thing. —polyonymous, adj. pseudonym a nom de plume or fictitious name, especially one used by an author to conceal his identity. Cf. allonymy. —pseudonymous, adj. sobriquet, soubriquet a nickname. tautonym a botanical or zoological name in which two terms are combined, the generic name and the specific, with both being the same. (a practice no longer approved by the International Code of Botanical Nomenclature.) toponym 1. a place name. 2. a personal name derived from a place name. toponymy 1. the study of the place names of a district. 2. Anatomy. the nomenclature of the regions of the body. —toponymie, toponymical, adj. trinomialism the use of three terms or names in the classification of a species, genus, variety, etc. —trinomial, n., adj. trionym a trinomial or name composed of three terms. typocosmy Rare. a universal system of nomenclature or classification.