SOME NEURAL TERMS. Ill 



last I now discern no opportunity for progress excepting in the 

 elaboration of details. It is my desire to devote the rest of my 

 life to the study of the brain, and this seems to be a fitting 

 time for submitting such statements of principle and sugges- 

 tions of practice as may facilitate the labors of others upon 

 Anatomic Nomenclature. 



The following definitions of course apply to the Latin forms 

 of the English words; the adjectives and other derivatives are 

 self-explanatory. 1 



Onym. From ovvpa, same as ovo^a, a name. Proposed by 

 Coues ('84) in the sense of biologic name. It is seldom needed 

 alone, but is the essential element or base (p. 112) of many 

 derivatives. 



Toponym. From onym and TO'TTOS, place. A term indicating 

 location or direction: e.g., lateral, at the side; laterad, toward 

 the side; transection, cutting across. 



Organonym. The name of a part or organ ; e.g., humerus. 



Neuronym. The name of a part of the nervous system. 



Polyonym. A name consisting of more than one word; e.g., 

 fissura centralis, rostnun carports callosi, plexus chorioidea ven- 

 triculi quarti, iter a tertio ad quartum ventriculum. This use 

 of the word polyonym is analogous to that of polyandry, 

 polygamy, etc. 



Dionym. A term consisting of two words ; e.g., vertebra 

 thoracalis, arteria brachialis, gyrus callosalis. Dionyms are 

 perhaps the most common kind of polyonyms. They have a 

 certain analogy with the technical names of animals and plants, 

 since the noun often indicates a group of similar or related parts 

 and the adjective designates a specific member of the group. 



Trionym. A term consisting of three words; e.g., vertebra 

 thoracalis prima. Here, as with the so-called trinomials of 

 zoology, the second adjective may be said to designate a 

 subspecies. 



Mononym. A name consisting of a single word; e.g., 

 insula. Strictly speaking, a mononym is either a noun or 



1 Definitions may be found also in the more recent English and medical 

 dictionaries. 



