INULA 



colic, when the ileum prolapses through the lips of the 

 ileo-cecal valve. 

 Inula (in'-u-lah) [L.]. Elecampane. The root of /. 

 helenium. It contains a crystalline substance, helenin, 

 C 8 H s O, the dose of which is gr. \ - \, and from 20 to 

 40 per cent, of a starch, known as inulin. It is a gentle 

 stimulant, and is employed in bronchitis and to hasten 

 the appearance of the skin-symptoms in exanthematous 



I vers. Dose gr: xx- 3jj of the root, or 3J -ij of a 

 ;coction, 3SS to the Oj. The genus Inula contains 

 irious coarse composite-flowered herbs of the old 

 orld, several of which have properties similar to those 

 ' the official species. 

 \\x\ in'-u-lin) [inula, elecampane], C 6 H 10 O 5 . I. A 

 vegetable principle found in the roots of dahlia, 

 in chicory, and other plants. It is a white powder, 

 with which iodin gives a yellow color, and is soluble 

 in hot water. See "Carbohydrates, Table of. 2. The 

 precipitate from a tincture of the root of Inula 

 helenium ; an aromatic stimulant, tonic, and expector- 

 ant. Dose I to 3 grains. Unof. 

 Inulol iin'-u-lol). See Alantol. 



Inunction [in-unk' -shun) [inunctio ; inunguere, to 

 anoint]. The act of rubbing an oily or fatty substance 

 into the skin. Also, the substance used for anoint- 

 ment. I. Treatment, a form of treatment of syphilis. 

 « consists in rubbing into the skin metallic mercury 

 some mercurial preparation, mixed or suspended in 

 fatty vehicle. It is active, sure, and rapid, but 

 ■ty and unpleasant. It is best used in the form of 

 the blue ointment of a strength of fifty per cent. 

 The application should be made upon different 

 portions of the body in successive treatments. 

 Inustion in-us'-chun) [inustio, a burning in]. A 



burning in ; deep or thorough cauterization. 

 Invagination [in-vaj-in-a' ' -shun)[invaginalio ; invagin- 

 are, to ensheathe] . The sheathing or telescoping of 

 a part or organ by a canal -like structure, as the intes- 

 tine. An operation for obliterating a hernial canal 

 by the inflammation resulting from pushing the skin 

 inward and suturing the parts together. 

 Invalid [in'-ral-id) [invalidus ; in, not; valere, to be 

 well]. One who is not well, especially one who is 

 chronically ill or whose convalescence is slow. 

 Invaliding [in' ' -val-id-ing) [in, not ; valere, to be well]. 

 The placing of a soldier or officer on the list of in- 

 valids, and thus excusing him from active duty. 

 Invalidism (in' val-id-izm) [in, not ; valere, to be well]. 

 Chronic ill-health ; the state or condition of being an 

 invalid. 

 Invenose (in-ve'-nos) [in, not; vena, a vein]. In 



biology, destitute of veins. 

 Invasion [in-va' -zhun) [invasio ; in, upon ; vadere, to 

 go]. The beginning or attack of a disease. Also, 

 the manner in which the disease begins its attack. L- 

 disease, one due to the presence in the body of some 

 al parasite, as the tapeworm or the protozoan of 



623 



'ermination [in-ver-min-a' -shun) [in, in ; vermis, 

 worm]. A condition of having intestinal worms ; ill- 

 health due to parasitic worms ; helminthiasis. 



Inverse Temperature. A complete reversal of the 

 usual course of the temperature, so that the morning 

 temperature exhibits the maximum, and the evening 

 temperature the minimum. It is not infrequently seen in 

 acute tuberculous affections, and rarely in typhoid fever. 



Inversio palpebrarum [in-ver 1 -she-o pal-pe-bra' -rum). 

 Synonym of Entropion. 



inversion [in-ver' '-shun) [inversio; in, not; vertere, to 

 turn]. A turning or placing in a position the opposite 

 01 the normal position. In chemistry, a decomposi- 

 tion of certain sugars and other carbohydrates, induced 





INVOLUTION 



by the action of a ferment or dilute acid, by which the 

 elements of water are added to a carbohydrate, each 

 molecule of which breaks up into two molecules of a 

 different carbohydrate. I. of Bladder, a condition 

 in which the bladder is in part or completely pushed 

 into the dilated urethra. It occurs in females only. 

 I. of Eyelashes. See Entropion. I. of Uterus, a 

 condition in which the uterus is partially or completely 

 turned inside out. 



Invert [in-vert') [in, in ; vertere, to turn]. To turn in 

 an opposite direction. I. -sugar, an amorphous 

 saccharine substance, the chief constituent of honey, 

 and produced by the action of ferments or dilute acids 

 on cane-sugar. It is regarded as a mixture of equal 

 parts of dextrose and levulose. A solution of cane- 

 sugar turns the polarized ray of light to the right, 

 while invert-sugar turns it to the left. From this in- 

 version of the action on polarized light the process is 

 called inversion, and the product invert-sugar. 



Invertase [in-ver* 'tas). Same as Invertin, q. v. 



Invertebrata [in-ver-te-bra' -tah) [in, not ; vertebra, 

 backbone]. Animals that have no spinal column. 



Invertin [in-ver*" -fin) [in, not; vertere, to turn]. A 

 ferment found in the intestinal juice, and produced 

 by several species of yeast-plant ; it converts cane- 

 sugar in solution into invert-sugar. See Eerments. 



Investing [in-ves* -ting) [investire, to invest]. Ensheath- 

 ing. surrounding. In dentistry, embedding a denture 

 in what is known as investing-material, for the pur- 

 pose of soldering the linings or backings of the teeth 

 to the plate. 



Inveterate [in-vetf -er-al) [inveteratus ; vetus, old]. 

 Long established, and obstinately resisting treatment, 

 as an inveterate skin-disease. 



Invirility yin-vir-il f -it-e) [in, not ; virilis, of a man]. 

 Lack of manly qualities, especially lack of virile power ; 

 male impotency. 



Inviscation [in vis-ka'-shun) [in, in; viscum, bird- 

 lime]. The mixing of food with the saliva during 

 mastication. 



Invital [hi-vi'-tal) [in, not; vita, life]. In biology, 

 non-living or dead matter. 



In vitro [invif-ro) [L.]. In the glass ; applied to 

 phenomena that are observed in experiments carried 

 out in the laboratory with microorganisms, digestive 

 ferments, and other agents, but that may not neces- 

 sarily occur within the living body. 



Involucel [in-vol' '-u-sel) [dim. of involucrum, involu- 

 cre]. In biology, a secondary involucre. 



I nvolucre 1 in' -vo-lu-ker) [involvere,to roll up, to wrapup] . 

 In biology, the bracts at the base of a flower-cluster. 



Involucrum [in-vo-lu' -krum) [involvere, to enwrap : 

 //. , Involucra~\. The covering of a part. The sheath 

 of bone enveloping a sequestrum in dry necrosis. 



Involuntary [in-vol' '-un-ta-re) [involuntarius : in, not; 

 volo, velle, to will]. Performed independently of the 

 will ; not by an act of the will. A term applied to 

 certain motions and functions of the various organs of 

 the body that are not controlled by, or are not depend- 

 ent on, the will. I. Contraction, muscular contrac- 

 tions not resulting from an act of the will. I. Muscles, 

 those that are not governed by the will. 



Involute [in'-vo-liif) [involvere, to roll up, towTap up]. 

 In biology, rolled up, as the edges of certain leaves in 

 the bud. 



Involution [in-vo-lu' -shun) [inrolutio; involvere, to roll 

 upon]. The retrogressive change to their normal con- 

 dition that certain organs undergo after fulfilling their 

 functional purposes. I. of the Uterus, the return of 

 the uterus, which after gestation weighs about two 

 pounds, to its normal weight and condition. I.- 

 forms, a term applied to microorganisms that deviate 



