GLOSSARY. 165 



Analge'sia (Gr. a, privative ; algesis, sense of pain). A con- 

 dition of the nervous system in which there is insensibility 



to pain, but pressure and tactile sense remain. 

 AnaTogy (Gr. ana, similar to ; logos, ratio, proportion). That 



kind of resemblance among the organs of animals which 



depends upon similarity of function, although structurally 



differing. 

 AnaTysis (Gr. ana-lusts,^ loosing, releasing). A splitting up of 



any compound substance into its elementary constituents. 

 Anelectrot'onus (Gr. ana, up; electron, amber). An electrical 



condition of a nerve, during the passage of a constant 



current. 

 An'giograph (Gr. anggeion, a vessel ; grapho, 1 write). A 



form of sphygmograph. 

 Anidrd'sis (Gr. an (= a), priv.; idros, sweat). Diminution or 



absence of sweat. 

 An'isotro'pous (Gr. anisos, unequal ; trepo, I turn). Doubly 



refractive. 

 An'ode (Gr. ana, up; odos, way). The positive pole: the 



point at which electric current enters a nerve or muscle. 

 Anos'mia (Gr. an, priv. ; osme, smell). Loss of smell. 

 Antagonistic muscles (Gr, anti, against ; ago/u'stes, a rival). 



Those muscles which are opposite in function, 

 Antipep'tone (Gr. anti, against ; pepto, I digest). A product 



of proteid digestion. 

 Aortic notch. (Gr. aorto, was suspended from aeiro, I raise 



up), That portion of a sphygmogram which precedes the 



dicrotic wave. 

 Apha'sia (Gr. aphasia, inability to speak from a, not, and 



phao, I speak). Loss of the power of speech; associated 



with lesion of Broca's convolution. 

 Apho'nia (Gr. aphonia, want of voice from a, without, and 



phone, voice), Absence of voice. 

 Apse'laphesia (Gr. apsis, a fastening ; aphesis, a letting go). 



Paralysis of tactile sensation. 

 Archiblas'tic (Gr. arche, beginning ; blasto, a bud). Certain 



embryonic cells which are said to be developed from all 



three layers of blastoderm. 

 Argyll Robertson pupil. A condition in which the pupil 



will react to accommodation, but not to light caused by 



interference with the connection between optic and oculo- 

 motor centres. 

 Arnold's nerve. The auricular branch of vagus. 



