GLOSSARY. 3 



A'crogen (Gr. akron, the summit; gennao, I produce). A 

 plant, the growth of which takes place at its summit. 



Acrd'mion (Gr. akron, the summit ; omos, a shoulder). The 

 process of the scapula which forms the summit of the 

 shoulder. 



Actinozo'a (Gr. aktis, a ray; zoon, an animal). A division of 

 the Co3lenterata. 



Adambula'cral oss'icles (L. ad, to ; ambulacrum, a walk shaded 

 with trees ; ossicle, a little bone). In the star-fishes, the 

 small ossicles against which the ambulacral ossicles abut, 

 and which lie at the sides of the groove which the ambula- 

 cral ossicles bound superiorly. 



Adduc'tion (L. ad, to ; duco, I lead). The bringing of a limb 

 to the middle line ; the reverse process to abduction. 



Adduc'tor. A muscle, the contraction of which brings a limb 

 to another or towards the middle line. In the Lamelli- 

 branchiata, the muscles which close the valves of the shell 

 are termed adductors. 



A'denoid (Gr. aden, a gland; eidos, form). Glandular; 

 applied to a special variety of connective tissue found in 



_ glands. 



A'dipose (L. ddeps, fat). Fatty. 



Ad'nate (L. ad, to ; natus, born). A term applied to the 

 stipules of plants which adhere to the petiole. 



Adre'nal (L. ad, to ; renes. the kidneys). A name given to two 

 glandular bodies connected with the kidneys. 



Adventi'tia capilla'ris (L. advcnttcius, foreign, strange; cdpillus, 

 a hair). A continuous covering which some capillaries 

 possess, and which is derived from the surrounding con- 

 nective tissue. 



,ffisthe sodie (Gr. aisthesis, sense, perception). Conveying 

 sensory impulses ; sensitive. 



JEtio'logy (Gr. aitiologia, the giving an account). The branch 

 of Biology which treats of the origin and development of 

 organic beings. 



Aetomor'phse (Gr. aetos, an eagle ; morphe, form). The birds of 



prey. 

 Afferent (L. ad, to ; fero, I carry). Carrying to, as an afferent 



nerve which conveys impulses to a nerve centre. 

 Aga'mic (Gr. a, not ; gamos, marriage). Applied to ova which 



germinate without being impregnated. 



Agamoge nesis (Gr. a, not ; gamos, marriage ; gennesis, a 

 beginning). Non-sexual reproduction. 

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