

LEPTOMENINGITIS 



671 



Leptomeningitis {lep-to-men-in-ji' -tis) [/.eTrrog, slight ; 

 membrane ; itic, inflammation]. Inflamma- 

 tion of the pia and arachnoid of the brain and the 

 spinal cord, in contradistinction to Pachymeningitis, 

 though meningitis alone usually signifies the same as 

 leptomeningitis. See Meningitis. L. cerebralis, an 

 inflammation confined usually to the pia of the convex 

 surface of an anterior lobe of the cerebrum. L., 

 Cerebro-spinal, an inflammation of the pia of the 

 brain and cord. L. spinalis, an inflammation of 

 the pia of the spinal cord. L., Tuberculous, an in- 

 flammation of the pia due to the presence of the 

 tubercle-bacillus. 



Leptcmeninx (lep-to-men' -ingks) [/.e-roc, delicate; 

 f, membrane: //., Leptomeninges\ The pia or 

 the arachnoid ; in the plural (leptomeninges) , usually 

 the arachnoid and pia taken together. 



Leptophonia {lep-to-fc/ -ne-ah) [/.f-roc , delicate ; dovr/, 

 voice]. Delicacy, gentleness, or weakness of the 

 voice. 



^eptophonic (lep-to-fon' '-ik) [/.eirroc , thin ; owv^, 

 voice]. Having a weak voice. 



Leptoprosope (lep-top f -ro-sop) \7xtzt6c, thin ; irp6oa- 

 5tov, face]. A person, or a head, with a long, narrow 

 face. 



Leptoprosopia {lep-to-pro-so' '-pe-ah) [?£~6g, thin ; 

 xpocoj-ov, face]. Narrowness of the face. 



Leptoprosopic, Leptoprosopous (lep-to-pro-sop* -ik, 



, lep-to-pros' '-o-pus) [/.c-ror, thin ; -pocurrov, face]. 

 Having a long, narrow face. 



Leptorhine (lep' -lor-in) [/^rrroc, thin; pig, nose]. 

 Having a slender nose or proboscis. See Index. 



Leptorrhinia (lep-tor-in' 'e-ah)\/£-r6c, thin ; p/c, nose]. 

 Narrowness of the nasal bones, or smallness of the 



■ nasal index. 



^eptorrhizous {lep-tor-i' -zus) [/.ETrrdg, thin ; piZ,a, root]. 



, Having a slender root. 



l^eptosporangiate (lep-to-spo-ran' -je-at) [/£7zr6g, slen- 

 der ; rj-opd, seed ; ayyeiov, vessel]. In biology, having 



i sporangia formed from a single cell. 



^eptothrix {lep'-to-thriks) [/f-roc, thin; OpiE, hair]. 



i A genus of bacteria, whose elements form straight fila- 

 ments, often of great length ; possibly indistinguishable 

 from the genus Bacillus, jl. buccalis, occasionally 

 found in the mouth, plays a part in the formation 

 of dental tartar and in the production of caries of the 

 teeth. L. gigantea, found in tartar of the teeth. See 

 Bacteria, Synottymatic Table of. 

 -eptotrichia {lep-to-trik'-e-ah) [?xTrrog, delicate ; dpiE, 



' hair]. Abnormal or excessive fineness and delicacy 



of the hah. 

 .eptoxylem (lep-to-zi' '-lent) [/-£"<5o, slender; Ev'/.ov, 



i wood]. In biology, undeveloped or rudimentary 



xylem. 

 -eptus (lep J '-tits) [/f-rroc, thin]. A genus of beetles. 

 L. autumnalis, harvest bug; mower's mite. A para- 

 site that burrows under the skin, causing lesions 

 similar to those of itch. See Pa rasites (Animal), 

 Table of. 

 -erema [ler-e'-maK) \}.ripT]ua, idle talk : pi. , Leremata~\. 

 An idle or childish utterance, as in senility, idiocy, or 

 : dementia, 

 eresis \l-r-e f -sis) [/.rjpriGic, a speaking foolishly]. 

 Garrulousness ; insane or senile loquacity, 

 eros (le'-ros) \}fjpoc, foolish speaking]. Slight delirium, 

 ' with talkativeness. 



!.erp [Australian]. A kind of manna found upon the 

 Eucalyptus ditmo?a, or mallee. an Australian shrub. 

 L.-amylum, C 6 H ;0 O 5 , a peculiar carbohydrate found 

 in the thready portion of lerp. 

 .esage, Bacillus of. See Bacteria, Svnonvmatic 

 i Table of. 



LETZERICH, BACILLUS OF 



Lesbian Love [/iolioc, Lesbian]. See Tribadism. 



Lesbianism (les / bean-ism) [/Jofliog, Lesbian]. The 

 doctrine of Lesbian love. 



Leschenema (Jes-ken-e'-mah) \j.kaxv, talk ; '/.Eaxnvev- 

 eiv, to chat]. Insane, senile, or hysteric loquacity. 



Lesion (le'-zhutt) \lcesio ; kedere, to hurt]. Any injury, 

 hurt, or wound in any part of the body. In pathology, 

 any morbid change. L., Central, one affecting the 

 central nervous system. L. of Continuity, a division 

 or break in any part that is normally continuous. L., 

 Diffuse, one involving all the tissues of an organ. 

 L., Focal, in the nervous system a circumscribed 

 lesion giving rise to distinctive and localizing symp- 

 toms. L., Initial, of Syphilis, the chancre. L., 

 Irritative, in the nervous system a lesion exciting 

 the functions of the part wherein it is situated. L. of 

 Nutrition, any pathologic alteration in the capillar)- sys- 

 tem, consisting of increase or decrease in the amount 

 of blood required for assimilation and absorption. 

 L., Organic, a morbid structural change in the tissues 

 of an organ. L., Peripheral, a lesion of the nerve- 

 trunks or of their terminations. L., Primary, of the 

 Skin, the change in the skin occurring in the devel- 

 oping stage of a skin-disease. This may be manifested 

 by the macule, the papule, the tubercle, the pomphus, 

 the phyma, the vesicle, the bulla, the pustule. L., 

 Primary, of Syphilis. See L., Initial. L., Sec- 

 ondary. I. In the skin, the change occurring in the 

 primary lesion, due to irritation or other causes. It com- 

 prises erosions, ulcers, rhagades, squama?, cicatrices or 

 scars, crusts, and pigmentation. 2. One of the second- 

 ary lesions of syphilis. See Syphilis. L., Systematic 

 or Systemic, in the spinal cord a lesion affecting one 

 or more distinct systems or tracts, as in posterior sclero- 

 sis, in which the posterior columns or tracts are dis- 

 eased. L., Traumatic, one due to an injury. 



Lesser's Triangle. See Triangles, Table of. 



Lethal (le'-thal) [letalis ; letum, or lethum, death]. 

 Deadly ; pertaining to or producing death. 



Lethal {le'-thal) \j.rflri, forgetfulness], C^H^O. An 

 alcohol found in spermaceti. 



Lethality {le-thal' -it-e) [lethalitas, from letum, death]. 

 Deadliness. 



Lethargic {leth-ar* -jik) [/.rfiapyiKoc, from '/rfiij, a for- 

 getting]. Relating to, affected with, or of the nature 

 of, lethargy. 



Lethargogenic (leth-ar-go-jen'-ik) \/.r/6apryoc, forget- 

 ful ; yevvaif , to produce]. Giving rise to lethargy. 



Lethargus (leth-ar'-gus). See African Lethargy. 



Lethargy (leth'-ar-je) [/.tfiapyia ; atjOt], forgetfulness]. 

 A condition of drowsiness or stupor that cannot be 

 overcome by the will. See, also, Somnambulism. L., 

 African, the African sleeping-sickness. L. of Silk- 

 worms. See Flacherie. 



Lethe {le'-the) [/jdn, forgetfulness]. Total loss of mem- 

 ory; amnesia 



Letheomania [le-the-o-ma' -ne-ah) \7.rfiij, oblivion ; 

 fiavia, madness]. Morbid longing for narcotic 

 drugs. 



Letheon (le J -the-on) [/.rj&rj. forgetfulness]. An old 

 trade name for ethylic ether, used as an anesthetic. 



Lethiferous (leth-if'-er-us) \}.iftn, forgetfulness ; ferre, 

 to bear]. Producing sleep. 



Letificant {le-tif'-ik-ant) \la-tificare , to make glad]. A 

 term applied to any remedy acting as a stimulant tonic 

 in melancholy and languor. 



Lettered (let'-erd) [littera, a letter]. In biology, pos- 

 sessing markings that resemble letters. 



Letterwort {let'-ter-wert). Same as Hellebore, q. v. 



Lettuce {let' -us). See Lactucarium. 



Letzerich, Bacillus of. See Bacteria, Synonymatu 

 Table of 



