ASTHMATIC 



144 



A I A\ [SM 



Synonym ol a. A., Thymic. Syn 



onym '//us stridulus. A. uteri. Syn- 



onym of Hysteria. 

 Asthmatic [az-maf '-ik) [ anting]. Relating to 



or affected with asthma. 

 Astigmagraph [d priv.; arty/ta, a 



point; j , to write]. An instrument for illustrat- 



g the phenomena matism. 



Astigmatic [a -tiq-maf-ik) [d priv. ; ariyfia, a point]. 



Pertaining to or affected with astigmatism. 

 Astigmatism '-mat-izm) [d priv t, a point, 



light from a point an- neverbrought to 

 a point by the refractive media of the eye]. That 

 ndition of the eye wherein homocentric rays of light 

 not brought to a focus by tin- media. It is usually 

 due to inequality of curvature of the different merid- 

 ians of the cornea i corneal A. i. but may be caused by 

 imperfections of the lens (lenticular), unequal con- 



' v 1 



Diagram Illustrating th-s Formation of Astigmatic 



Images. 

 The figures below cjve the images corresponding to the posi- 

 tions of the perpendicular lines above. The vertical rays 

 brought to a focus anterior to the horizontal. V. = ver- 

 tical rays ; H =- horizontal 



traction of the ciliary muscle, or may perhaps be clue 

 to retinal imperfection. It may be acquired or con- 

 genital, and may complicate hypermetropiaor myopia, 

 producing either simple hypermetropic A., in which 

 one principal meridian is emmetropic, the other hy] i i 

 metropic ; or compound hypermetropic A., in which 

 both meridians are hypermetropic, but one more so 

 than the other. Complicating myopia, we may in the 

 same way have simple myopic or compound myopic 

 A. In mixed A., one principal meridian is myopic, 

 the other hypermetropic. Regular A. is when the 

 two principal meridians are at right angles to each other. 

 Irregular A., when different parts <>f a meridian have 

 different refracting power-. 



Astigmatometer [as-tig-mat-om / -et-er\ [a priv. ; arlyua, 

 a point : a measure]. An instrument for 



measuring the degree of astigmatism. 



Astigmometer A Hgmatom- 



eter. 



Astigmometry [as-tig mom* priv. ; ariyfia, a 



point; measure]. The measurement of astig- 



matism. 



Astomous [ah-sto , -mus) [d priv. ; ard/xa, mouth]. In 

 biology, without a mouth or aperture. 



Astragalectomy (as-trag-al-ek'-to-me) [aorpAyatot , 

 astragalus; n]. Surgical excision of 



the astragalus. 



Astragaloscaphoid {as-trag-al-o-skaf'-oid) \ 



'far, astragalus; aiaupoeidfc, like a boat]. Relating to 

 the astragalus and the scaphoid bo 



Astragalotibial (as-lrag-al-i il) [aarpAya'KoQ, 



astragalus; tibia, the -bin bone ] . Relating to the 

 astragalus and the tibia. 



Astragalus {as-trag ' al-u \ [aarpAyaXog, a dice ; the ana- 

 logous bones of the sheep were used by the ancients 

 as dice ]. I he ankle bone, upon which the tibia rests. 

 Mso, a genus of leguminous plants from some varieties 

 ot which gum tragacanth is derived. A. mollissi- 

 mus, Loco Plant. The active principle of this plant 

 has mydriatic properties. Unof. 



Astrapaphobia [as-trap-af-o' -be-ah) [aorpairf, light- 

 ning; oAfSog, fear]. Morbid and unreasonable fear 

 of lightning. 



Astraphobia [as-trah-fo'-be-aK). See Astrapaphobia . 



Astriction {as-trik' -shun) [astri, ti : ad, to ; stringere, to 

 bind ]. < lonstipation or any condition resulting from the 

 use of astringer) 



Astringency {as-trin'-jen-se) [ad, to; stringere, to bind]. 

 The quality of being astringent. 



Astringent \as-trin' -jent) [ad, to; stringere, to bind]. 

 i. Causing contraction; binding. 2. An agent pro 

 ducing contraction of organic tissues, or that arrests 

 hemorrhages, diarrheas, etc. Tannin, alum, opium, 

 alcohol, the salts of silver, lead, etc., are examples. 



Astrokinetic {as-tro-kin-ef -ik) [aorpov, a star; kive'iv, 

 to move]. In biology, applied by Ryder tothepheno 

 mena of motion as exhibited by the centrosomes of 

 cells. 



Astrostatic [as-tro-staf '-ik) [harpov, a star; iaraadai, to 

 stand]. In biology, applied by Ryder to the resting 

 condition of the centrosomes of cells. 



Asylum [as-i f -lum) [asylum, a place of refuge]. An 

 institution for the support, safe-keeping, cure, or edu- 

 cation of those incapable of caring for themselves, such 

 as the insane, the blind, etc. A. Ear. See Hematoma 

 auris, and Ear Deformities. 



Asymbolia [ah-si?n-bo f -le-ah\ [a priv. ; ai)fifio7xiv, sym- 

 bol]. The loss of all power of communication, even 

 by signs or symbols. 



Asymmetry (ah-sim'-et-re) [a priv. ; pia, sym- 



metry]. 1. Unlikeness of corresponding organs or 

 parts of opposite sides of the body that are normally 

 of the same size, etc., as e.g., asymmetry of the two 

 halves of the skull or brain. 2. The linking of carbon 

 atoms to four different groups; the combination of 

 carbon atoms with different atoms or atomic groups. 



Asynergia (ah-sin-er* '-je-ak) [d priv.; truvepyia, co- 

 operation], faulty coordination of the different or- 

 gan- ormuscles normally acting in unison. 



Asynesia (as-in-e' '-ze-ah) [aavveaia, stupidity]. Stupid- 

 ity ; loss or disorder of mental power. 



Asynodia {ali-sin-o'-dc-ah) [it priv. ; owod a, a travel- 

 ling together]. Impotence. 



Asystematic lah-sis-lem-at' '-ik) [a priv. ; aixTrrj/ia, 

 system]. Diffuse ; not restricted to any one or several 

 systems of nerve libers ; applied to nervous diseases 

 that are general. 



Asystole {a'i-sis'-t<>-[,) [d priv ; ovardM), a shortening]. 

 Absence or imperfection of the cardial systole, due 

 to feebleness, dilatation, et< .. of the heart. 



Asystolic [ah-sis-toV -ik) [it priv ; nrnrn'/i/, a shorten 

 rag]. Marked by, due to, or suffering from asystole. 



Asystolism {ah-sis , -tol-izm) [a priv. ; ovoTOAf/, a sin, Men 

 ing]. Inability of the ri^ht ventricle oi the hear! to 

 empty itself of its contents, a condition encountered in 

 the lasl stages of mitral incompetence. See Asystole. 



Asystoly {ah-sis* -to-le) . Same a- ./ vstolf. 



Atactic [at-ak'-tic) [aranToq, irregular]. Irregular, 

 incoordinate. Pertaining to muscular incoordination, 

 lly in aphasia. Also applied to il fevers 



Atavic {at-a ' tvu , a forefather]. Relating to 



or characterized by atavism. 



Atavism {at'-av-izm) [atavus, a forefather]. There- 

 appearance of an anomaly, physical, menial, or patho- 

 logic, in an individual whose more or less remote 



