DIl'IIVCKNIC 



377 



DIPSOSIS 



caudal fin-rays arranged equally above and below 

 the extremity of the spinal column. 



Diphygenic [dif-i-gen' ik) [<5^v//c, of a two-fold nature 

 or form ; yevvav, to produce]. In biology, producing 

 successively two sorts of embryos. 



Diphyllous (cii-jil'-us) [J/'c, two; tyv'A'Aov, leaf]. In 

 biology, composed of two leaves or sepals. 



Diphyodont \diff -e-o-dont) [dupv/'/c, twofold; ddovg, 

 tooth]. In biology, having two sets of teeth, as the 

 milk-teeth and the permanent teeth. 



Diplacusis [dip-lak-u' '-sis) \_Snr%6og, double; axovaig, 

 hearing]. I. The hearing of a tone as higher by one 

 ear than by the other ; called D. binauralis. 2. The 

 hearing of two tones by one ear, when only one tone 

 is produced ; called D. uniauralis, or D. monauricu- 

 /art's. 



Diplanetic (di-plan-ct'-ik) [J/c, twice ; Tr'/avriToq, wan- 

 dering]. In biology, applied to organisms that are 

 tw'ce active with an intervening period of qui- 

 escence. 



Diplastic (di-plas'-tik) [J/c, two; -/.aaaetv, to form]. 

 A term applied to cells having two substances in their 

 constitution. 



Diplegia [di-pW -je-aK) [rf/c, double; -?.r/yij, stroke]. 

 Coincident paralysis of two corresponding parts, as of 

 the two arms. Double or bilateral hemiplegia. 



Diplegic (di-p/e'-Jik) [r5/c, double ; ~'/a/yi/, stroke]. Re- 

 lating to or of the nature of diplegia. 



Dipleuric [di-plu' -rik) [<J/c, two; ir'Aevpd, side]. In 

 biology, bilaterally symmetric. 



Diplococcus (dip-lo-kok'-us) \_di-\6oq, double ; kokko^, 

 kernel]. A micrococcus whose spherules are joined 

 two and two. See Micrococcus and Bacteria. 



Diplocoria (dip-lo-ko' -re-ah) [Sltvaoo^, double ; ndpr/, 

 pupil]. That state in which the pupil is double. 



Diploe {dip'-lo-e) [ihn?,oi/, a fold]. The cellular osse- 

 ous tissue between the tables of the skull. 



Diploetic (dip-lo-et'-ik) [Si-'/.oi/, a fold]. Relating to 

 the diploe ; diploic. 



Diplogenesis (dip-lo-jen' '-es-is) [_(h-r?.6oq, double ; yeveaiq, 

 production]. The development of a double or twin 

 monstrosity. 



Diploic [dip-lo' -ik) [_6tTv?.oij, a fold]. Pertaining to the 

 diploe. 



Diploma {dip-lo' -mah) [diir'Aufia, a diploma]. A doc- 

 ument granted by an authorized body of men, show- 

 ing that the recipient has performed certain work under 

 the prescribed conditions, and is entitled to a definite 

 professional rank and title. 



Diplomyelia ( dip-lo-tni-e' '-le-ah ) [ SmAooq, double ; 

 fivs?Mc, marrow]. An apparent doubleness of the 

 spinal cord, produced by a longitudinal fissure. 



Diplophony (dip-loff'-o-ne) [di-Mog, double ; ©wry, 

 voice]. Same as Diphthongia. 



Diplophonia (dip-lo-fo'-tte-ah) [ov-P.oor, double; o< ■ \ , 

 voice], A rare symptom of laryngeal disease in 

 which a double note is produced in the larynx. It is 

 stated by Gottstein to occur in some cases of paraly- 

 sis, or when a small tumor is situated so that on pho- 

 nation it lies between the vocal band-. Cf. Diph- 

 thongia. 



Diplopia {dip-lo* -pe-ah) [ih-/6or, double ; btfiig, sight]. 

 Double vision, one object being seen by the eye or eyes 

 as two. D., Binocular, the most frequent, is due to 

 a derangement of the muscular balance, the images oi 

 the object being thereby thrown upon non-identical 

 points of the retinae. D., Crossed, or D., Heter- 

 onymous, the result of divergent strabismus, the 

 image of the right eye appearing upon the left side, 

 and that of the left eye upon the right side. D., 

 Direct, or D., Homonymous, the reverse of Crossed 

 D.,due either to paralysis of the external rectus or 



over-action of tin- internal rectus. D., Physiologic, 

 that produced when an imperfect image is seen beyond 

 or within the distance of tin- object accommodated for 

 and transfixed by the visual axes. D., Monocular, 

 or D., Uniocular, diplopia with a single eye, usually 

 due to polycoria or other imperfections of the media. 



Diplopic (dip-lo' -pik) \6tir7i6o , double; bipiq, sight]. 

 Relating to or affected with diplopia. 



Diplopiometer {dip-lo-pe-om' -et-er) \8tir7u6og t double; 

 61/xc, sight; fierpov, measure]. An instrument tor 

 measuring the degree of double vision. 



Diploplacula {dip-lo-plak / -u-lah\ [<)/-'/</oc, double ; 

 irXdfj, a tablet or plate]. In biology, a placula or 

 discoid embryo composed of two layers of cells. 



Diplostemonous {dip-lo-stem' -o-nus) [6m'/.6oc, double ; 

 ori/iicjv, a thread]. In biology, applied to a flower in 

 which the stamens are double the number of sepals and 

 petals. 



Diploteratography (dip-lo-ter-al-og' -ra-fe) [SarMog, 

 double; repac, a monster; ypdipetv, to write]. A 

 term used by Fisher to denote the description and 

 diagnosis of special forms of double monsters. 



Diploteratology (dip-lo-ter-at-ol'-o-je) [(Utz'auuc, double; 

 repaq, a monster; "kdyog, science]. The science of 

 twin monstrosities. 



Dippel's Animal Oil. < Ileum cornu cervi ; a pyrolig- 

 neous oil, containing ammonium carbonate, amin>, 

 and aromatic compounds. It is obtained in distilling 

 bone and deer's horn. It is antispasmodic and stimu- 

 lant, Unof. 



Dipropargyl (di-pro-par' '-/// ), C fi H H . One of the hydro- 

 carbons ; a mobile liquid, of penetrating odor, isomeric 

 with benzene ; it boils at S5 C. ; its specific gravity at 

 l8° C. equals o.Sl. If allowed to stand or if heat be ap- 

 plied to it, dipropargyl polymerizes and becomes thick 

 and resinous. 



Diprosopia (di-pro-so'-pe-ah) [fJ/c> double ; ■xp6cu~ov, 

 face]. In teratology, the duplication of the face. 



Diprosopus [di-pros' -o-ptis) [6iq, double ; Trpoau-nv, 

 face]. A monster characterized by a duplicity of the 

 face and head, frequently associated with hydroceph- 

 alus, acrania, defective development of the brain, 

 and spina bifida. The diprosopi have been classified 

 as follows: I. Diprosopus diophthalmus. 2. D. dis- 

 tort! us. " Fisher has described the tirst case of dipro- 

 sopus diophthalmus, or distornus, reported in English. " 

 There was anencephalus, a broad duplex nose, two 

 mouths, one oral cavity, two tongues. 3. D. trioph- 

 thalmus. In this variety there are three eyes, often 

 with other deformities of the face and head, such as 

 acrania, hare lip, and cleft-palate. 4. D. tetrophthaJ- 

 i/ius. In this variety the differentiation of the two 

 faces is further advanced, but there are still but two 

 ears. There are present four eyes. 5. D. triotus. In 

 this variety there are usually four eyes and always three 

 ears. 6. D. tetrotus. In this variety, the intermediate 

 stage between diprosopus and dicephalus, there are 

 four eyes and four ears, with considerable duplicity in 

 the cervical region. This is an extremely rare condi- 

 tion in the human race. 



Dipsesis [dip [Aiipt/atg, thirst]. Extreme thirst. 



Dipsetic {dip-set'-ik) \pvtyi(Tui&s, causing thirst]. Caus- 

 ing or attended with thirst. 



Dipsomania [dip-so-ma* '-ne-ah) [Alifta, thirst ; uavia, 

 madness]. The uncontrollable desire for spirituous 

 liquors. This is generally considered as a disease. 



Dipsomaniac (dip-so-ma f -nc-ak) \6h\>a, thirst; fiavia, 

 madness]. A person affected with dipsomania. 



Dipsopathy [dip-sop' -a-the) [Siipa, thirst; -ulhc, affec- 

 tion]. Any disease depending upon or related to 

 alcoholic excess. 



Dipsosis (dip- so' -sis). See Dipsesis. 



