42) nomenclature. The American HeritageŽ Dictionary of the English Language: Fourth Edition. 2000.
...2. The procedure of assigning names to the kinds and groups of organisms listed in a taxonomic classification: the rules of nomenclature in botany. Latin nomencltra,...

43) protist. The American HeritageŽ Dictionary of the English Language: Fourth Edition. 2000.
...The protists now belong to the kingdom Protoctista, a new classification in most modern taxonomic systems. From New Latin Protista, former kingdom name, from Greek...

44) identify. The American HeritageŽ Dictionary of the English Language: Fourth Edition. 2000.
...the origin, nature, or definitive characteristics of. 3. Biology To determine the taxonomic classification of (an organism). 4. To consider as identical or united;...

45) homonym. The American HeritageŽ Dictionary of the English Language: Fourth Edition. 2000.
...is kept). 2a. A word used to designate several different things. b. A namesake. 3. Biology A taxonomic name identical to one previously applied to a different species...

46) synonym. The American HeritageŽ Dictionary of the English Language: Fourth Edition. 2000.
...or symbolic substitute for another. 3. Biology A scientific name of an organism or of a taxonomic group that has been superseded by another name at the same rank....

47) variety. The American HeritageŽ Dictionary of the English Language: Fourth Edition. 2000.
...from other groups by a specific characteristic or set of characteristics. 4. Biology a. A taxonomic subdivision of a species consisting of naturally occurring or...

48) kingdom. The American HeritageŽ Dictionary of the English Language: Fourth Edition. 2000.
...and mineral) into which natural organisms and objects are classified. 5. The highest taxonomic classification into which organisms are grouped, based on fundamental...

49) diagnosis. The American HeritageŽ Dictionary of the English Language: Fourth Edition. 2000.
...3. Biology A brief description of the distinguishing characteristics of an organism, as for taxonomic classification. Greek diagnosis, discernment, from diagignoskein,...

50) race 1. The American HeritageŽ Dictionary of the English Language: Fourth Edition. 2000.
...the same species in the frequency of hereditary traits. A race that has been given formal taxonomic recognition is known as a subspecies. b. A breed or strain, as...