GLOSSARY OF TECHNICAL TEEMS 



ABIOGENESIS (Gr. a, without ; ./3i'os, life ; yeWo-u, birth), 



spontaneous generation, the origin of living from not living 



matter. 

 ACHROMATIC FIGURE (Gr. a, without; \p^a, colour), that part of 



the nuclear figure which remains colourless after treatment 



with certain staining reagents. 

 ALBUMEN (Lat. albumen, white of egg), a proteid substance which 



occurs in the white of eggs. 

 ALLANTOIS (Gr. dAAa?, sausage), a membranous bag which grows 



out from the alimentary canal in the embryos of higher 



vertebrates, and serves as an organ of respiration or nutrition, 



or both. 

 ALLELOMORPH (Gr. dAA?jAa)y, one another ; JUO/J^T}, kind, sort, form), 



one of a pair of alternative characters in Mendelian 



inheritance. 



AMBULATORY (Lat. ambulator, walker), used in walking. 

 AMITOTIC (Gr. a, without ; JUU'TOS, thread), a term applied to 



nuclear division without mitosis (q.v.) . 

 AMNION (Gr. apvlov), a membranous bag which encloses the 



embryo in higher vertebrates. 



AMOEBOID, a term applied to movements like those of Amoeba. 

 AMPHIMIXIS (Gr. dju<K on both sides ; /xtftj, mingling), the 



mingling of maternal and paternal characters in the fertilisa- 

 tion of the egg. 

 ANABOLISM (Gr. avafioXri, throwing up), the constructive chemical 



processes which go on in the living body, whereby food 



material is converted into protoplasm. 

 ANALOGY (Gr. dvoAoyto), superficial resemblance due to similarity 



of function. 

 ANATOMY (Gr.'cba, ro/x?y, cutting up), the study of the structure 



of organisms (more especially as revealed by dissection). 

 ANDRCECIUM (Gr. avr/p, man ; ofaCov, dwelling), the collective 



stamens or " male " organs of a flower. 



