Knight —10— Dictionary 



Anthesis. — The bursting of the anthers; the expansion of the 

 flower ; the time when f ertiUzation takes place ; the period from 

 the bursting of the bud to the setting of the fruit. 



Anthropogenesis. — The evolutionary descent of man. 



Anticipation. — A tendency for a character to become manifest 

 at an increasingly early age in each successive generation. 



Anticipation, Law of. — The age of onset of dementia tends 

 to be earlier in each successive generation of the family, until 

 it finally culminates in amentia. (Later work casts consider- 

 able doubt on this "Law".) 



Anti-haemorrhagic Vitamin. — Vitamin K. 



Anti-neuritic Vitamin. — Vitamin B^. 



Anti-nyctalopia Vitamin. — Vitamin A. 



Antipodal Cone. — The cone of astral rays opposite the 

 spindle (Van Beneden; Wilson). 



Anti-rachitic Vitamin. — Vitamin D. 



Anti-recapitulation. — The resemblance of an adult descen- 

 dent to an ancestral embryo so that the descendent loses from 

 its life-history the adult ancestral characters. 



Anti-scorbutic Vitamin. — Vitamin C. 



Anti-sterility Vitamin. — Vitamin E. 



Antithetic Generations. — Alternate generations of haploid 

 and diploid type which are morphologically distinct. 



Antithetical Dominance. — See Dominance, Hypothesis of 

 Antithetical. 



Anti-xerophthalmia Vitamin. — Vitamin A. 



Apatetic Coloration. — Protective coloration. 



Apetalous. — Lacking petals. 



Aphallism. — The state of having no penis. Adj. Aphallic. 



Apocarpy. — The condition of having the carpels separate. 



Apocyte. — A multinucleate mass of protoplasm arising either 

 by nuclear division or cell fusion, cf. Coenocyte and Syncy- 

 tium. 



Apogameon. — A species containing both apomictic and non- 

 apomictic individuals (Camp & Gilly). 



Apogamogony. — Agamospermy when followed by an alter- 

 nation of generations. 



Apogamous. — See Apogamy. 



Apogamy. — The production of seed or progeny by sexual 

 organs or related structures without fertilization, the embryos 

 being formed from haploid nuclei (but not from ova). Typi- 

 cally the embryo is formed by the development of two fused 

 embryo-sac cells. {See Apomixis). Adj. Apogamous. See 

 under Reproduction. 



