LATERALITY 



662 



LAUDANUM 



tendon-reflexes, and absence of sensory and nutritive 

 disorders. A peculiar characteristic jerking gait is pro- 

 duced, and clonus of the limb may be readily excited. 

 Males are most frequently affected, and the disease 

 occurs usually between the ages of twenty and fifty. 

 Syphilis, exposure, and traumatism are mentioned as 

 causes. The duration is long. L. Sclerosis, 

 Secondary, the descending degeneration that takes 

 place in the lateral columns of the spinal cord after 

 and below lesions of the cerebrospinal axis. L. 

 Sinuses, the two veins of the dura mater situated in 

 the attached margin of the tentorium cerebelli. L. 

 Ventricles. See Ventricle. 



Laterality (lat-er-al'-it-e) [lateralis, belonging to the 

 side]. Excessive development on one side. 



Lateralization (lat-eral-iz-a' -shun) [lateralis, lateral]. 

 The localization of a disease upon one or the other side 

 of the body. 



Lateralized (laf '-er-al-lzd) [lateralis, lateral]. Local- 

 ized on one side ; directed to one side. 



Lateren (lat'-er-en) [latus, side]. Belonging to the 

 lateral aspect in itself. 



Latericious, Lateritious (lat-er-ish' '-us) [lateritius ; 

 later, brick]. Pertaining to an urinary sediment resem- 

 bling brick-dust. 



Latericorn (laf ' -er-ik-orti) [latus, side ; cornu, horn] . 

 In biology, one of the lateral pieces of the bill-sheath 

 of certain birds. 



Latericumbent (lat-er-ik-um' '-bent) [latus, side ; cum- 

 bere, to lie] . Lying on the side. 



Lateriflection, Lateriflexion (lat-er-iflek' -shun) . See 

 Lateroflection. 



Laterifolius (lat-er-if-o' '-le-us) [latus, side ; folium, a 

 leaf]. In biology, growing alongside of a leaf. 



Laterigrade (lat'-er-ig-rdd) [latus, side; gradus, step]. 

 Progressing sideways. 



Laterinerved (laf ' -er-in-ervd) [latus, side : nervus, 

 nerve] . In biology, applied to such leaves as have 

 lateral nerves. 



Laterirectus (lat-er-ir-ek' '-ties) [latus, side ; rectus, 

 straight]. The rectus capitis lateralis muscle. See 

 Muscles, Table of. 



Lateriversion (lat-er-iv-er'-shun). See Lateroversion. 



Latero -abdominal (lal ' er-o-ab-dom' ' -in-al)[latus ■, side ; 

 abdominalis , pertaining to the abdomen]. Pertaining 

 both to the side and the abdomen. L. Posture, Sims' 

 posture. See Postures, Table of. 



Laterocaudal (lat-er-o-kaw'-dal) [latus, side; cauda, 

 tail]. In biology, situated laterally and posteriorly. 



Latero-cervical (lat-er-o-ser' -vik-al) [lateralis, lateral ; 

 cervix, the neck]. At or about the side of the neck. 



Laterodorsal (lat-er-o-dor' '-sal) [latus, side; dorsum, 

 back]. In biology, placed at one side of the upper 

 surface. 



Lateroflection, or Lateroflexion (lat-er-o-flek' -shun) 

 [lateralis, lateral ; flectere, to bend]. Flexion or 

 bending to one side. 



Lateromarginal (lat-er-o-mar'-jin-al) [latus, side; 

 margo, edge]. Placed on the lateral edge. 



Lateronuchal (lat-er-o-nu' -kal) [latus, side; nucha, 

 nape]. Situated at the side of the nape of the neck. 



Lateropulsion (lat-er-o-pul' -shun) [lateralis, lateral ; 

 pellere, to drive]. An involuntary motion or bearing 

 to one side ; a symptom in certain central neuroses. 



Lateroretroversion (lat-er-o-re-tro-ver' -shun) [latera- 

 lis, lateral ; retro, backward ; vertere, to turn]. Re- 

 troversion (of the uterus), with deviation to one 

 side. 



Laterostigmatal (lat-er-o-stig' -mat a!) [latits, side ; 

 stigma, a mark]. In entomology, located on the 

 side of the body above the stigmata. 



Lateroversion (lat-er-o-ver' -shun) [latus, side ; vertere. 



to turn]. A term applied to the deviation of the 

 uterus from the central position. It may be quite con- 

 sistent with health and require no treatment 



Latex (la'-teks) [L., liquid : pi. , Latices\ The sap or 

 the juice of the tubes or vessels of plants. L. -cells, 

 cells giving rise to latex or milky juice. 



Latham's Theory. A theory as to the constitution of 

 the proteid molecule ; it claims that the living proteid 

 is composed of a chain of cyanalcohols, or cyanhydrins, 

 as they are sometimes termed, united to a benzene 

 nucleus. 



Lathyrin (lath' -ir-in) [/.aOvpic, pulse]. A bitter ex- 

 tractive of lathyrus. 



Lathyrism (lath'-ir-izm) [\aBvpiq, pulse]. Lupinosis; 

 an affection, observed only in males, produced by the 

 use of meal from varieties of vetches, chiefly the 

 Lathyrus sativus and L. cicera. The grain is popu- 

 larly known as the chick-pea. It gives rise to a 

 form of spastic paraplegia, with tremor, involving 

 chiefly the legs, and this may proceed to complete 

 paraplegia. There is exaggeration of the knee-jerk 

 and ankle-clonus. The arms are rarely, if ever, 

 affected. It appears to be a slow sclerosis induced by 

 this toxic agent. 



Lathyrus (lath' -ir-us) [XdOvpig, pulse]. A genus of 

 leguminous plants. L. cicera, a species of vetch, 

 commonly known as "chick-pea." L. sativus. 

 See Lathyrism. 



Latibulum (la-tib' '-u-lum) [L., latere, to lie hid]. A 

 lurking-place for disease, infection, or poison. 



Laticiferous (lat-is-if-er-us) [latex, liquid ; ferre, to 

 bear]. In biology, producing or containing latex, or 

 milky juice. 



Laticostate (lat-ik-os' -tat) [latus, broad; costa, rib]. 

 Having broad ribs. 



Latifia (la-tif-e'-ah) [Cf. Ratafa\ An alcoholic li- 

 queur, or aromatic cordial, with tonic drugs, as gentian, 

 cherry-bark, quassia, and rhubarb ; it is called also 

 Dutch bitters. 



Latifoliate (lat-ifo> '-le-ai) [latus, broad ; folium, a 

 leaf]. Broad-leaved. 



Latipennate (lat-ip-en'-df) [latus, broad ; pennatus, i 

 winged]. In biology, broad- winged. 



Latipennine (lat-ip-en' '-in). Same as Latipennate. 



Latissimus (jut-is' -im-us) [superl. of latus, wide]. An 

 adjective signifying widest. It is used as descrip- i 

 tive of certain muscles. L. colli. See M 

 (Platysma myoides), Table of. L. dorsi. 

 Muscles, Table of. 



Latrine (la-tren') [Fr.]. A water-closet or privy, 

 especially one in a public place or institution. 



Lattice-work of the Thalamus. The formatio retic i 

 ularis, q. v. 



Latus (la'-lus) [L.]. Broad. L. ani, synonym of j 

 Levator ani. See Muscles, Table of. 



Laudable (law'-da-bl) [laudabilis, or laudan 

 praiseworthy]. Formerly, indicative of a healthy or! 

 improving condition ; characterizing an active intlam 

 mation, as laudable pus. (Obs.). 



Laudanin (laiv' -dan-in) [laSavov, a gum], C M H 

 One of the alkaloids of opium. It is soluble in 

 roform and in alkaline solutions. 



Laudanosin (law-dan' -o-sin) [l&fiavov, a gi 

 GjjH^NOj. A crystallizable alkaloid of opium. 



Laudanum (lod'-an-um) [derivation undetennine 

 by some derived from taudatum medicamentum, thel 

 praiseworthy drug ; by others from laude di, 

 worthy of praise ; by others, again, from Ladan 

 Tinctura opii. 'Ate Opium. L., Liquid. Synonyi 

 Vinum opii. See Opium. L., Rousseau's, a | 

 ration used in Belgium, France, and Mexico, consi 

 of opium, honey, beer-yeast, water, and alcohol. L.. 



