GLOSSARY. 



Explanations of certain words used in this book, with which the 

 general reader may be unfamiliar. 



Acclimation, The spontaneous or natural process of becoming, 

 or the state or condition of being, inured or accustomed to 

 a climate at first injurious, (Page 321,) 



Acclimatization, Generally used in a more active sense than 

 acclimation, as denoting the positive means or acts (as of 

 man) in causing an organism to become inured to a 

 climate. The distinctions between the two words are not 

 generally carefully drawn, but acclimatization is preferred 

 for scientific uses, (Page 321,) 



Acquired, In contemporary evolution writings, the word ac- 

 quired is used to designate those characters or attributes 

 which arise in the lifetime of the given individual as the 

 result of external or environmental agencies, in distinction 

 to those attributes which are supposed to be the result of 

 antecedent or generation forces. 



Adaptive modifications are those which obviously fit or 

 prepare an organism to live in given environments, and 

 which are evidently produced or superinduced by those en- 

 vironments, 



Anabolism, That kind of metabolism (or chemical change in 

 the compounds of organic bodies) which results in greater 

 or more progressive complexity of organization ; ascending, 

 synthetic, or constructive changes. Compare Catabolism, 

 (Page 347,) 



Analogous, Applied to organs or members which have similar 

 function or uses. Compare Homologous, 



Bathmism. a term employed by Cope to designate the force or 

 energy of growth, to which some of the variation of organ- 

 isms is ascribed, "The vital forces are (nerve-force) 



(491) 



