PSEUDOTOXIN 



437 



PSYCHOLOGY 



Pseudotoxin (su-do-toks 4 '-in). A name given to extract 

 of belladonna containing other substances. 



Pseudotrichogenesis (sudo-trik-o-jen'-e-sis). See 

 Pseudotrichosis . 



Pseudotrichosis (su-do-tnk-o' -sis) [tfevdijc, false; 0/m'£, 

 hair]. The growth of hair in an abnormal location. 



Pseudotuberculosis (su-do-tu-bur-ku-liS-sis) [yet-Ayc, 

 false ; tuberculum, a tubercle]. A condition simulat- 

 ing tuberculosis, but due to other infection than that 

 of Bacillus tuberculosis. See Paratuberculosis. 



Pseudoturbinal (su-do-tur / -biu-al). In comparative 

 anatomy an osseous eminence accessory to the turbinal 

 bone. 



Pseudotympany (su-do-tim' -pan-e). See Abdomen, 

 Accordeon. 



Pseudovacuoles (su-do-zak / -u-olz). Transparent 

 bodies containing pigment found by Laveran in blood 

 of malarial patients. 



Pseudovermicule {su-do-vur / -mik-ul) [lbtvdiic, false ; 

 vermes, worm] . The motile stage in the development 

 history of certain plasmodia, as that produced from the 

 fertilized macrogamete in the case of the malarial 

 parasite and allied organisms. Cf. Microgamete, Ga- 

 mete. 



Pseudoxanthoma, P. elastica (su-do-zan-tho r -mah). 

 Darter's name for a rare chronic disease of the skin 



» characterized by an eruption of yellowish plaques, 

 slightly elevated, with an especial predilection for cer- 

 tain parts of the skin, e. g., lower abdomen, axilla, 

 sides of neck, etc., in which it differs from true 

 xanthoma, which affects by preference the flexures of 

 fingers, the extensor surfaces of elbows and knees, etc. 

 It differs histological!)' from true xanthoma in being a 

 degeneration of the elastic tissue of the skin. 



Pseudulcus (sud-ul'-kus). A false ulcer. P. ventric- 

 uli, a sensory neurosis of the stomach closely resem- 

 bling gastric ulcer. 



Pseudydrops (sud-r" -drops) [iftevdr/i;, false; vSpcnj), 

 dropsy]. False dropsy. 



Psida (si'-da). Pomegranate-bark. 



Psilosis. (See Illus. Diet. ) 2. See Aphtha tropica. 

 3. See Ptilosis (Illus. Diet.). 



Psilothin, Psilothinum (si-lo^-thin, si-lo-thr'-num). 

 A depilatory cerate containing elemi, 40% ; benzoin, 

 iOy ; rosin, $fy ; yellow wax, 10% ; and diachylon 

 plaster, 30 <£ ; applied warm, and then cool, remove 

 with the hair adhering. 



Psilothric (si-Id' -thrik) [if>i?.u0pov, a depilatory]. De- 

 pilatory. 



Psilotic (si-lt/-tik). Relating to depilation or to 

 sprue. 



Psittacism (sif-as-izm) [1>irraKoc, a parrot]. The ac- 

 quisition of ability to produce sounds by mere parrot- 

 like imitation. 



Psittacosis (sit-ah-o'-sis) [^irraaoc, a parrot]. A dis- 

 ease of birds, especially parrots, introduced into Paris, 

 in 1 89 1, by some parrots from South America, and 

 marked by diarrhea, depression, and loss of feathers. 

 It is transmissible to man. in whom it runs the course 

 of a violent typhoid fever without abdominal symptoms 

 but with pulmonary disorders resembling severe infec- 

 tious pneumonia. The period of incubation is from 

 7 to 12 days and the duration about 30 days. It is 

 due to Bacillus psittacosis, Widal and Sicard. 



Psoadotomia (so-ado-to* -me-ah) [voat, the loin mus- 

 cles ; rouij, a cutting]. Incision of the psoas muscle. 



Psole iso'-le) \j>u7jf\. The penis. 



Psophometer (sof-om'-et-ur) [ij>6foc, a noise ; uirpov, 

 measure]. A stethoscope. 



Psoralea {so-rale'-ah) [rpu/xi/Joc, mangy]. A genus 

 of leguminous plants. P. bituminosa, L., Harzklee, 

 a species of southern Europe, is antispasmodic, anti- 



pyretic, and emmenagog. It is the trisphyllon of 

 Nicander, the triphyllon of Hippocrates and Galen. 

 P. corylifolia, L., a species of Arabia, East India, and 

 China. The seeds are used as a stomachic in leprosy 

 and skin-diseases and the fruit in spermatorrhea. P. 

 esculenta, Pursh., prairie turnip of the northwestern 

 United States, is used as food by the Indians. P. 

 glandulosa, L., a species of Chili ; the root is emetic ; 

 the leaf, chulen or culen, is used as a stomachic, an- 

 thelmintic, and vulnerary. The root of P. meli- 

 lotoides, Michx., Congo root. Bob's root, Samson's 

 snake root, of Yirginia. is recommended as an aromatic 

 bitter tonic. P. pentaphylla, L... of Mexico; the 

 root is used as a substitute for contrayenra. It con- 

 tains psoralin. 



Psoralin (so* -ral-in). An alkaloid discovered by Lo- 

 zano, 1893, in Psoralea pentaphylla, L. Its action is 

 antiperiodic. 



Psorenteritis (so-renter-i* -tis) [t-upa, scabies ; irrepop, 

 intestine]. The intestinal condition in Asiatic cholera. 



Psoriasic (so-ri-a'-sik). Relating to psoriasis. 



Psoriasiform (so-ri-as / -e-form). Resembling psoriasis. 



Psoriasis. (See Illus. Diet) Syn., Scabby leprosy; 

 Willan' s leprosy ; Lepidosis psoriasis (Willan); Lepra 

 albaras ; L. alphosis ; L. Crustacea; L. crustosa; L. 

 Gra'corum ; L. of Willan. P. abdominalis. a form 

 affecting the trunk. See P. inveterata (Illus. Diet.). 

 P. asturiensis. 1. Pellagra. 2. Leprosy. P. capil- 

 litii, a dry psoriasis of the scalp. P. composita. 

 psoriasis combined with some other skin-disease. P. 

 linguaae, P., Lingual. See Leukoplakia buccalis 

 (Illus. Diet.). P. lotricum, a form attacking the 

 hands and arms particularly of washwomen. Syn., 

 Washwoman' s itch : Eczema lotricum. P. membranae 

 mucosae oris. See Leukoplakia buccalis (Illus. 

 Diet.). P. osteacea, psoriasis associated with affec- 

 tions of joints. P. pistorum, baker's itch. 



Psoroneurilymitis (so-ro-nu-ril-im-r'-tis) [ilvpa, the 

 itch; vebpov, nerve; 7vua, a thing to be removed]. 

 F. W. Sieber's term for neurilemmas induced by the 

 irritation of scabies. 



Psoroneurymenitis (so-ro-nu-re-men-r'-tis). See Pso- 

 roneurilymitis. 



Psorophora (so-rof '-or-ah) [LtJ.xi, itch ; 0006. a bring- 

 ing forthl. A genus of large mosquitos established by 

 Desvoidy, of which but one species inhabits the United 

 States. P. howardii, Coquillett, a species discovered 

 by Cohen in South Carolina. 



Psorospermosis. (See Illus. Diet. ) P. follicularis 

 cutis, P. follicularis vegetans. See Keratosis follic- 

 ularis waft. Darter's Disease (Illus. Diet.). 



Psychal. See Psychic { Illus. Diet.). 



Psychalia (si-ka'-le-ah) [tfi',vi. mind]. A morbid con- 

 dition attended by hallucinations. 



Psychasthenia isi-kas-the'-ne-ah) [Y^JT?. mind; ao0i- 

 ieia, weakness]. Mental fatigue. 



Psyche. See Illus. Diet. ) 2. One of the names ap- 

 plied to the vis vifce or vital principle. Cf. Physis, 

 Ptieuma, Thermon. 



Psycheism (si'-ke-izm). Hypnotism. 



Psychiatrics (si-ke-at / -riks). See Psychiatry (Illus. 

 Did 



Psychoalgalia (si-ko-al-ga / -le-ah) [tij/;. mind; Skyoc, 

 pain]. Mind-pain, intense mental distress and melan- 

 choly associated with such hallucinations as lead to utter 

 despair. Syn. , Algopsychalia. 



Psychocortical (si-ko-kor / -tik-al\. Relating to the 

 portion of the cortex controlling mental operations. 



Psychology. (See Illus. Diet.) P., Abnormal, the 

 study of all irregular or unusual mental phenomena, as 

 illusions, hallucinations, trance, hypnotism, automatism, 

 intoxication and psychic effects of drugs, telepathy, in- 



