ATHERt iMATOl S 



in; 



ATRACTY1 IS 



Atheromatous ath-er-o' mal-u • [dfl . an athero 



matous tumor]. Characterized b) or affected with 



atheroma. 



Atherosperma {ath-er-o-sper' -mah) [_""'<"• beard; 

 IT. \ genus of trees. A. moschatum, 

 Australian sassafras, a diaphoretic and diuretic some 

 times used in pulmonary affections and asthma. Dose 

 of the tincture. 3ss— j. Unof. 



Athetoid . unfixed]. Pertainin 



or affected with athetosis. A. Spasm, a symptom of 

 hemiplegia and some cerebral lesio 



Athetosis {ath-et-o' -sis) [afhjros, unfixed ; changeable]. 

 A symptom most frequently occurring in children, and 

 characterized by continual change oi position of the 

 fingers and toes, and inability to keep them still, save in 

 sleep. It is due to some lesion or derangement of 

 the brain or cord. It is also railed " post-hemiplegic 

 chorea,'" from its occurrence alter hemiplegia, in 

 adult>. A., Double Congenital. See Farapl 

 I n ''ant; : also Double Atheto 



Athlete v, to contend with]. Robust; 



vigorous. A.'s Heart, incompetency of the aortic 

 . a condition frequently found in athletes. 



Athletics {ath-lef '-iks) [oBaeIv, to contend]. The art 

 of physical exercise for development or for health. 



Athrepsia {ah-tht ih) [d priv : rpkfyeiv, to nourish] . 



The symptom-complex resulting from imperfect nutri- 

 tion in children. 



Athroisemia {ath-roi-se / -me-ah ■ [adpoto/ia, accumula- 

 tion ; aiiia, blood]. Congestion or accumulation of 

 blood. 



Athymia [ah-thi' -m'e-ali) [o priv. ; Hi nor, mind], i. 

 Despondency. 2. Loss of consciousness. 3. Insanity. 



Athymic {ah-lhi r -mik) \_" priv. ; dvfioc, mind]. All: 

 with athymia. 



Atlantad {at-lan' -tad) ["ArAac, a Greek hero] . Toward 

 tin- atlas in situation or direction. 



Atlantal [at-ldn' '-tal) ['ArP-ac, a Greek hero]. Relating 

 to the atlas. 



Atlanten {at-lan f -ten) [' \r'/ ar, a Greek hero]. Belong 

 ing to the atlas in itself. 



Atlanti-obliquus {at-lan' '-ti-ob-li' '-kwus) [I-]- ' '' ' 

 obliquus capitis superior muscle. 



Atlanti-rectus {at-lan f -ti-rek' -tus) [L.]. The muscle 

 called rectus capitis posticus minor. 



Atlanto- {at-lan'-to) ["ArAac , a Greek hero]. A prefix 

 signifying relation to the atlas; seen in the won!, 

 anto-axial, (relating to the atlas and the axis) Atlan- 

 cipital, Atlanto-odotitoid , etc. 



Atlas i at' -las) [ar/ar, able]. The uppermost of the 

 cervical vertebra;. It articulates with the occipital bone 

 the skull. A. Silk. See Silk. 



Atlee's Operation. See Operations, Table of. 



Atlodidymus {at-lo-did? -im-us). Same as Atlodymus. 



Atlodymus [at-lod' '-im-us) [ur'/nr, able; Sidx 

 double]. A monosomic dual monstrosity; with two 

 heads and a single body. 



Atloido- ' Of, able]. In composition, the 



same as atlanto; seen in such example-, as atloido- 

 id, atloido-Oi . etc. 



Atmiatry {at-mi' -at-re) \jiTu\c, vapor ; larpeia, medical 

 treatment]. Treatment of diseases of the lungs or 

 mucous membrane-, by inhalation, fumigation, or by 

 directing a current of vapor or gas upon the part. 



Atmid-albumose {at-mid-al' '-bu-mos) [<>'"", vapor; 

 albumen]. Neumeister's term for the albumose formed 

 by the action of superheated steam. 



Atmidometer {at-mid-om' '-et-er) . See Atmometer. 



Atmidoscope \<it-mid f -o-skop) \Jirinr, vapor; itkoti 

 to view]. See Atmomett >. 



Atmograph {at* -mo-graf\ [amor, breath iv, to 



record]. A form of self-registering respirometer. 



Atmometer, or Atmidometer [at- mom' '-et-er ; at-mid- 

 om' -et-er) [arfiig, vapoi ; uirpov, a measure]. An in- 

 strument to measure the amount of water exhaled 

 from a given surface in a given time, in order to d. 

 mini- the humiditj of the atmosphere. 



Atmosphere {at'-mos-fer) [ar/idg, vapor; ofaipa, a 

 sphere]. The mixture of gases, vapoi oi water, and 

 other suspended matters, surrounding the earth, as an 

 elastic fluid envelop, to tin height of about 200 

 mih-. 



Atmospheric {at-mos-fer' '-ik) [dr/«jc, vapor; oiftaipa, a 

 sphere]. Pertaining to the atmosphere. A. Moisture. 

 the vapor of water mingled with the atmosphere. It 

 varies in quantity according to tin' temperature. A. 

 Pressure Cavity, a cavity formed on the palatine sur 

 face of a sel of artificial teeth to retain them in the 

 mouth. A. Tension, the pressure of the air pel 

 square inch on the surface of a body. Normally, at 

 the sea level it i- about 14.7 lbs. per square inch, or 

 ual to that of a column of mercury about 30 in. in 

 height. It decreases about /„ in., or fo ft), per square 

 inch for every 90 feet of altitude. Above 10,000 feet, 

 the rarity of the atmosphere is usually noticeable in 

 quickened breathing and pulse rate. 



Atocia {at-o'-se-ak) [aroKog, barren]. Sterility of the 

 female. 



Atom (at'-uw) [a priv.; ri/iveiv, to cut]. The ulti- 

 mate unit of an element ; that part of a substance 

 incapable of further division, or the smallest part 

 capable of entering a chemical compound, or uniting 

 with another to form a Molecule — which last i- the 

 smallest quantity of a substance that can exist free or 

 uncombined. See Elements, Tab, 



Atomic {at-om'-ik) [a priv.; ripveiv, to cut]. Of or 

 pertaining to atoms. A. Heat of an atom is its 

 specific heat multiplied by its atomic weight. A. 

 Theory, the theory of Dalton, that all matter is com- 

 posed of atoms, the weight of each atom differing for 

 the different substances. A. Valence, Equivalence, 

 or the Atomicity of an element, is the saturating 

 power of its atom as compared with that of hydrogen. 

 A. Weight, the weight of an atom of an element as 

 compared with the weight of an atom of hydrogen. 



Atomicity (at-om-is' -it-e) [d priv. ; rijiviiv, to cut]. 

 < hemical valence; quanti valence. 



Atomization {at-om iz a'-shun) [d priv. ; rifiveiv, to 

 cut]. The mechanical process of breaking up a liquid 

 into line spray. 



Atomizer (,//' om-i-zer) [a priv. ; rifivziv, to cut]. An 

 instrument for transforming a liquid into a spray or 

 mist. 



Atonia {at-o' '-ne-ah) [arovia, want of tone]. Atony. 



Atonic {at-on'-ik) [arovia, want of tone]. Relating to. 

 1 if characterized by, atony. 



Atony {at'-o-ne) [d priv.; r6vag, tone]. Want of • 

 Debility. Loss or diminution of muscular or vital 



' 1 " '''•'}' • 



Atopomenorrhea {at-o-po-men-or-e' '-ah) [aroirog, out oi 

 place; ur/v, month; pkeiv, to flow], vicarious men 

 struation. 



Atoxic 1 '//(') [d priv.; ro ik6v, poison]. Not 



venomous ; not poisonous. 



Atrabiliary {at-rah-bil' -e-a-re) [ater, black ; bilis, bile"]. 

 An obsolescent term relating to melancholj and hypo 

 chondriasis; also referring to the renal and supra renal 

 glands, once believed to produce black bile, or atra 

 bilis, the cause of the gloomy disposition. A., 

 Capsules, an old name lor tin- supra renal capsules. 



Atractylis {at-rak' '-til-is) [arpaicrvXigl. A genus of 

 composite-flowered plants, nearly related to the saf- 

 llower {Carthamus). A. gummifera, of the Mediti 1 

 ranean region, affords acanthomastic . A. lancea, of 



