This is a list of terms and symbols used in scientific names for organisms, and in describing the names. For proper parts of the names themselves, see List of Latin and Greek words commonly used in systematic names. Note that many of the abbreviations are used with or without a stop. Naming standards and taxonomic organizations and their codes and taxonomies ICTV – International Committee on Taxonomy of Viruses ICSP – International Committee on Systematics of Prokaryotes formerly the ICSB – International Committee on Systematic Bacteriology publishes the ICNP – International Code of Nomenclature of Prokaryotes formerly the International Code of Nomenclature of Bacteria (ICNB) or Bacteriological Code (BC) ICZN – International Commission on Zoological Nomenclature publishes ICZN the International Code of Zoological Nomenclature or "ICZN Code" IBC – International Botanical Congress publishes ICN the International Code of Nomenclature for algae, fungi, and plants formerly ICBN or the International Code of Botanical Nomenclature (current version the Shenzhen Code) also publishes ICNCP or the International Code of Nomenclature for Cultivated Plants IAPT – International Association for Plant Taxonomy publishes Taxon also publishes Regnum Vegetabile which contains the IBC's ICN, the Index Nominum Genericorum, and the Index Herbariorum General terms clade, cladistics phylum, phylogeny taxon, taxonomy; Taxon is a journal of the IAPT, where proposals are made synonym : a name for a taxon different from the currently accepted name pro parte (abbreviation p. p.; "for part" in Latin) senior synonym, (zoology) : the earliest (correctly published) name junior synonym, (zoology) : any later name homotypic synonym (botany) heterotypic synonym (botany) : (or taxonomic synonym) a synonym that comes into being when a taxon is reduced in status ("reduced to synonymy") and becomes part of a different taxon; the zoological equivalent is "subjective synonym" objective synonym (zoology) subjective synonym (zoology): see taxonomic synonym taxonomic synonym (botany): see taxonomic synonym basionym or basyonym (botany), or protonym or original combination (zoology): original name on which the current name is based; in bacteriology "basonym" combinatio nova (comb. nov.) : new combination; when a taxon has been given a new name, preserving one of the previous components status novus (abbr. stat. nov.) : new status; when a taxon has been given a new rank homonym : names spelled identically, but, in some codes, names spelled similarly, as defined by the code senior homonym (zoology) : the first legitimate use of the name which generally takes priority