CROCOXIC ACID 341 



_ Jainin powder, 2 scruples ; powdered zinc oxid, ^ 

 dram ; olive oil and lime-water each one ounce. It 

 lied on soft rags. 



Crocus (krS-kus) [upono^, crocus, saffron]. Saffron. 

 The stigmata of the flowers of C. sativus. (This should 

 not be confounded with American Saffron, Carthamus 

 tiuctorius. i It is an aromatic stimulant and emmena- 

 gogue, commonly used as a cooling-agent. C, Tinct., 

 io per cent, in strength. Dose 3 j-ij ; of the drug, 

 gr. v— xx, in infusion. 



Crocydismus (kro-sid-iz'-mus) [upoavdi^eiv, to pick at]. 

 ' zrphology. 



Croft's Operations. See Operations, Table of 



Crooke's Tube. A highly exhausted vacuum-tube used 

 in producing X-rays. 



Crop ikrop) [ME. , crop, the craw of a bird]. The 

 aw or pouch of the esophagus of a bird. C. -bound, 

 i disease of poultry in which the fowls are unable to 

 the food from the crop into the gizzard, and the 

 armer becomes filled with food, hanging like a bag 

 front of the bird. 



sby's Operation. See Opera/tons, Table of. 

 ss (kros) [crux, a cross]. In biology, a cross-breed 

 plants, the result of cross-fertilization. C. -birth, 

 koulder-presentation, or other presentation requiring 

 ;ion. C. -circulation. See Circulation. C.-eye. 

 Strabismus. C. -fertilization, in biology, the fer- 

 tilization of the ovules of one species by the seed- 

 germs of another. C.-knee. See Genu valgum. 

 C.-leg, a deformity that sometimes follows double 

 hip-joint disease ; the legs are crossed in walking. 

 C. -legged Progression, a method of walking in which 

 one foot gets over or in front of the other. It is a 

 symptom of certain cord-lesions. 



Crossed (krosd) [crux, a cross]. Having the shape of 

 a cross. Applied to alternate sides of the body. C. 

 Anesthesia. See Anesthesia. C. Hemiplegia. See 

 Stanroplegia. C. Paralysis. See Paralysis. C. 

 Reflexes, an exception to the usual law of reflex 

 movements, in which, e.g., excitation of one fore-limb 

 induces movement in the opposite hind-limb. See 

 Reflexes, Table of. 



Crotalin (kro'-tal-in) [updrawv, a rattle]. An albumin- 

 ous body contained in the poison of the cobra. It is 

 not coagulable by heat at 212 C. 



Crotalus • kro'-lal-us) [Kpbra'/sn> , a rattle]. A genus 

 of serpents, including the typical rattlesnakes. C. 

 Poison. The virus of the rattlesnake, used as a 

 remedy by homeopathists. 



Crotchet {kroch'-et) [ME., crochett, a little hook]. A 

 hook used in extracting the fetus after craniotomy. 



Croton [kro / -ton) [uporuv, a tick]. A great genus of 

 euphorbiaceous plants. C. eleuteria, yields cascarilla. 

 C. tiglium, croton oil ; C. niveus, a part of the pro- 

 duct called copalche bark. C. Aldehyd, C 4 H 6 0, a 

 compound obtained by the condensation of acetaldehyd 

 when heated with dilute HC1, with water and zinc 

 chlorid ; it is a liquid, soluble in water, possessing an 

 irritating odor ; it boils at from 104 to 105 and has 

 a sp. gr. of 1.033 at °°- 1° tli e air it oxidizes to cro- 

 tonic acid. C. Chloral. See Chloral butylicum. 

 C. Oil. See Tiglii, Oleum. 



3rotonol krt/-ton-ol) [xpdrwv, a tick], C 9 H u O,. An 

 acid, aromatic principle in croton oil, believed to be the 

 vesicant constituent of the oil. 



3roup (iroop) [AS., kropan, to cry aloud]. Membran- 

 ous croup ; pseudo-membranous croup ; true croup ; 

 a disease of the larynx and trachea of children, 

 prominent symptoms of which are a peculiar cough, 

 and difficulty in breathing ; it is often accompanied by 

 the development of a membranous deposit or exudate 

 upon the parts. There is doubt as to the real nature 



CRUSO-CREATIXIX 



of the disease, some contending that it is laryngeal 

 diphtheria, while others believe it a special type of 

 disease. See also Roup. C, Catarrhal, an affection 

 of childhood characterized by paroxysms of intense 

 dyspnea and a peculiar, ringing, metallic cough. C, 

 False, catarrhal or spasmodic croup ; catarrhal laryn- 

 gitis. C, Spasmodic. See C, Catarrhal. 



Crown (hroTtm) [SIE., crowne, a crown]. See Corona. 

 C. Glass, a kind of glass used in optics. C. Leather. 

 See Leather. C. -setting, the operation of uniting an 

 artificial crown to the root of a natural tooth ; the 

 operation being commonly known by the misnomer 

 "pivoting. " C. of a Tooth, the exposed part of 

 the tooth above the gums, covered with enamel. 

 C.-work, the adaptation of an artificial crown of 

 porcelain or gold on the cervical portion of the natural 

 root of a tooth. C. -yellow. Same as Chrome-yellow. 



Crucial (kru'-shal) [crux, a cross]. Resembling or 

 pertaining to a cross, as a crucial incision. 



Cruciate (kru f -slie-dt) [crux, a cross]. In biology, 

 shaped like a Greek cross. 



Crucible (hru'-sib-l) [crucibulum, a melting pot]. A 

 vessel of conical shape in which substances are ex- 

 posed to the heat of a fire or furnace ; it is formed of 

 clay or earthenware, porcelain, iron, black lead or 

 plumbago or graphite, silver, gold or platinum. 



Crucifixion Attitude (kru-se-fik' '-shun). See Atti- 

 tude. 



Crucing (kru'-sing). See Block Teeth. 



Cruels (hroo / -elz). Synonym of Scrofula. 



Cruentin (kru-en' -tin) [cruentus, bloody]. A preci- 

 pitate obtained by boiling defibrinated blood with 

 strong H 2 S0 4 , adding water, and filtering. 



Crull's Line. See Line. 



Cruorin (kru'-or-in) [cruor, blood]. Synonym of 

 Hemoglobin. 



Crupper (krup'-er) [Fr., croupe, the rump]. The but- 

 tocks of a horse. C.-bone, the coccyx. 



Crura (kru'-rah) [Plural of crus, a leg]. A name ap- 

 plied to certain parts of the body, from their resemb- 

 lance to legs or roots. C. cerebelli, the peduncles 

 of the cerebellum, superior, middle, and inferior. C. 

 cerebri, the peduncles of the cerebrum. C. of Dia- 

 phragm, the muscular bundles arising from the verte- 

 brae, etc., and inserted into the central tendon. C. 

 of Penis, the corpora cavernosi. 



Crural (kru'-ral) [crus, a leg]. Pertaining to the 

 thigh. C. Arch. See Ligament. C. Hernia, fe- 

 moral hernia. C. Ring, the femoral ring; the upper 

 opening of the temporal canal, bounded in front by 

 Poupart's ligament and the deep crural arch, behind 

 by the pubis, internally by Gimbernat's ligament, 

 externally by a fibrous band separating it from the 

 femoral ring. 



Crureus {kru'-re-us) [L.]. One of the muscles of the 

 thigh. See Muscles, Table of. 



Crus (hrus) [L.]. The leg; structures resembling a 

 leg. See the plural, Crura. 



Cruso-creatinin {kru-so-kre-af-in-iri), C 5 H 8 N 4 0. A 

 leucomalne, isolated from muscle-tissue. In this and 

 other leucomalnes of the Creatinin Group, as well as 

 in those of the Uric Acid Group, hydrocyanic acid 

 plays an important part in the molecular structure of 

 the bases. Very little is yet known as to the function 

 of this Cyanogen Group in relation to the vital activ- 

 ity of tissues, but recent investigations seem to show 

 that the seat of the cyanogen-formation lies within 

 the nucleated cell, and is intimately connected with 

 the functions of the nuclein-molecule. A number of 

 leucomalnes of fresh muscle-tissue are credited with 

 possessing an intensely poisonous action ; and, if this 

 be the case, any accumulation of such bases in the 



