IwETIFICANT 



654 



LAMELLA 



Laetificant {le-tif'-ik-ant). See Letificant. 



Laevo- {le'-vo-). For words so commencing, see Levo-. 



Laevorotatory {le-vo-ro' -ta-tor-e) . See Levorotatory. 



Laevulin {lev'-u-lin). See Levulin. 



Laevulose {lev'-u-los). See Levulose. 



Lafayette Mixture. A mixture employed in gonor- 

 rhea. It contains copaiba, cubebs, liquor potassae, 

 sweet spirit of niter, and is known also as the com- 

 pound copaiba mixture. See Copaiba. 



Lag Tooth. A delayed tooth. A name for the molar 

 or wisdom tooth. 



Lagam-balsam {lag'-am-bal'-sam). A variety of gur- 

 jun-balsam brought from Sumatra. 



Lagarous {lag'-ar-us) [?M.yap6g, lax]. Lax, loose, or 

 soft. 



Lagena {laj-e'-nah) \laywoq a flask, bottle: pi., Lag- 

 ence~]. In biology, the flask-like extremity of the 

 cochlea in certain vertebrates. 



Lageniform {laj-en' -if-orm) \lagena, a flask ; forma, 

 form] . Flask-shaped. 



Lagentomum {laj-en' -to-mum) [ 2.ayug, hare ; tv, in ; 

 roy.ij, a cutting]. Hare-lip. Cf. Lagochilus. 



Lagnea, or Lagneia {lag-ne'-ah, or lag-ni' -ah) \jkay- 

 veia, coition, lust]. Same as Satyriasis. Also, coition. 

 Also, the semen. 



Lagnesis {lag-ne' -sis) [Tiayvr/g, lewd]. Same as Saty- 

 riasis. L. furor, unconquerable lust. L. valacitas, 

 lust capable of control. 



Lagnosis {lag-no' -sis) . Same as Lagnesis. 



Lagochilus {lag-o-ki'-lus), or Lagochilos {lag-o-ki'- 

 los) [layug, hare ; ^eZAof, lip]. Hare-lip. Cf. Lagen- 

 tomum. 



Lagophthalmia {lag-off-thai' '-me-a/i). Same as Lag- 

 ophthalmos. 



Lagophthalmic {lag- off-thai' -mik) [Xayug, hare ; 

 bodaXfidg, eye]. Pertaining to or affected with lagoph- 

 thalmos. 



Lagophthalmos {lag-off-thai' -mos) [layuq, hare ; 

 6<&0a2./i6g , eye ; from the popular notion that a 

 hare sleeps with open eyes]. Inability to close the 

 eyes. 



Lagopodous {lag-op' '-o-dus) [layuirovq, hare-footed]. 

 In biology, hare-footed ; densely clothed with long 

 and soft entangled hairs. 



Lagostoma {lag-os' -to-mah) [2.ayug, hare ; ardfia, 

 mouth]. See Hare-lip. Cf. Lagochilus and Lagen- 

 tomum. 



Lagrange's Exterminator. An apparatus for destroy- 

 ing the ectoparasites of poultry. It is a wooden box 

 into which the bird is introduced with its feet tied, its 

 head being kept outside by a special opening. In the 

 box a brimstone match is burned ; a few minutes of 

 exposure to this vapor suffice to kill the parasites. 



La Grippe {lah grip) [Fr.]. Synonym of Influenza. 



Laisne's Method. A method of abdominal massage. 

 The masseur lays his hands on either side of the ab- 

 domen, and executes a firm but not violent double 

 rubbing movement, one hand ascending as the other 

 descends, the principal pressure being made by the 

 thenar and hypothenar prominences ; the movements 

 do not extend higher than the transverse colon, or 

 lower than the ileum. 



Laity {la'-it-e) [la6g, the people]. The non-profes- 

 sional public. 



Lake {lak). See Pigments, Colors, and Dye-stuffs, and 

 also Lacus. L.-burn. See Fardel-bound. L.- 

 colored, applied to blood in which the hemoglobin, 

 having separated from the stroma, is dissolved in the 

 serum. 



Lakmoid, Lacmoid {lak'-moid)\Jac, milk ; eldoc, like]. 

 A delicate reagent in alkalimetry, made by acting on 

 resorcin with sodium nitrate. 



Lakmus {lak'-mus). See Lacmus. 



Laky {la' -he). See Lake-colored. 



Lalia {la'-le-ah) ['Aalid, talking]. Speech. 



Lallation {lal-a' -shun) [lallatio ; lallare, to babble]. 

 Any unintelligible stammering of speech, such as the 

 prattling of a babe. Also, the defect or peculiarity 

 of speech, usually racial, in which / is substituted 

 for r. 



Lalling {lal'-ing) [lallare, to babble]. Lallation; 

 prattle; baby-talk. 



Laloneurosis {lal-o-nu-ro' -sis) \jka\ng, prattle ; r 

 nerve : pi. , Laloneuroses~\ . An impairment of speech 

 arising from spasmodic action of the muscles. It in- 

 cludes stammering and aphthongia. 



Lalopathy {lal-op' -ath-e) tydlnc, speech; iratioq, dis- 

 ease]. Any disorder of speech. 



Lalophobia {lal-o-fo' -be-ah) \jkakog, prattle ; ooSog, 

 fear]. Stutter-spasm, leading to, or complicated 

 with, a dislike of speaking. 



Laloplegia {lal-o-ple' -je-ah) [X&Xog, talking; - 

 a stroke.] Paralysis of speech, not due, however, to 

 paralysis of the tongue. 



Lamarckism or the Lamarckian Theory. The doc- 

 trine based upon the teachings of the French naturalist, 

 J. B. P. A. de Monet de Lamarck (1744-1829), who 

 attempted to explain the progressive evolution of nature 

 by virtue of an inherent tendency to development 

 through the appetency and habits of living organisms, 

 the efforts excited by change of conditions reacting 

 upon the structure. It is based on the theory that 

 matter acted upon by heat, light, and electricity may 

 spontaneously generate life of low, homogeneous 

 organisms, and that such organisms would develop 

 qualities of heterogeneity and organs as governed by 

 their surroundings, and especially by their wants or 

 desires. To this preponderating influence of new- 

 wants Lamarck ascribes the chief role in evolution, 

 while Darwin emphasizes the advantage of acciden- 

 tal variations in the struggle for existence. See 

 lamarckism. 



Lambda {lam'-dah) \16.fj,ji6a, the Greek letter /]. 

 The junction of the sagittal and lambdoid sutures at 

 the apex of the latter. See Craniometric Points. 



Lambdacism(/«w / -a'rti , -?'2;w) [Aa/udaKiafidg, lambdacism]. 



1. Difficulty in uttering the sound of the letter /. 



2. Too frequent use of the /sound, or its substitution 

 for the r sound ; lallation. 



Lambdoid, or Lambdoidal {lam' -doid ox lam-Joi' dal) 

 [Ad///?<5n, the letter "k ; eldog, resemblance]. Resem- 

 bling the Greek letter A. L. Suture, the suture 

 between the occipital and the two parietal bones. 



Lambert's Method. A method of mixing color- by 

 colored wafers and a slip of glass. By means of re- 

 flections from the surface of the latter one color may 

 be in part reflected and superimposed on another 

 color. 



Lame {law) [ME., lame, lame]. Crippled; halting; 

 limping. 



Lamel {lam-el') [lamella, dim. of lamina, a plate]. 

 A medicated disc, made with some soluble basis; it 

 is used in the dosimetric application of drugs to the 

 eye, etc. 



Lamella {lam-el' -ah) [dim. of lamina, a plate: pi, La- 

 mella']. A descriptive term applied to any foliation >>r 

 scale-like appearance; a thin lamina, scale, or plate. 

 L. of Bone, the concentric rings surrounding the 

 Haversian canals. L., Bronchial, one of the foldl 

 of the mucosa of the gills of fishes and certain 

 molluscs. L. carnosa, that part of the parietal 1 

 blast from which the muscles of the trunk 

 developed. L. ceratina, the epiblastic layer giving 

 origin to the skin and its appendages. L. cerebellare, 



