INCREMENTAL 



608 



INDIA 



Incremental (in-kre-men' -tal) [increment urn, growth]. 

 Pertaining to increment or growth. I. Lines. See 

 Salter's Lines, in Lines, Table of. 



Incrustate (in-krus'-tdt) [incrustare, to incrust]. Form- 

 ing a crust, or coated with a brittle or granular substance. 



Incrustation (in-krus-ta' -shun) [incrustare, to cover 

 with rind]. The formation of a crust. Also, the for- 

 mation of a calcareous deposit in organic tissue. 



Incubation {in-ku-ba'-shun) [incubare, to sit on eggs]. 

 I. In medicine, the period between the implanting of 

 the contagium and the development of the disease. For 

 the periods of incubation of some of the most import- 

 ant diseases, see Exanthemata, Table of. 2. The pro- 

 cess of sitting upon eggs to favor hatching. See Table 

 under Pregnancy. 



Incubator (in' ' -ku-ba-tor)[incubare, to sit on eggs]. A 

 device for the artificial hatching of eggs or cultivation 

 of microscopic plants ; a couveuse (a. v.) for the pre- 

 servation of the life of children prematurely born. I., 

 Crede's, a copper tube made with double walls, be- 

 tween which water at the desired temperature may be 

 kept, and withdrawn by means of pipes and stop-cocks. 

 I., Tarnier's, an apparatus for the rearing of prema- 

 ture children, consisting of a box with two compart- 

 ments, one containing the child, the other, and lower 

 compartment, being filled with warm water, so as to 

 keep a uniform temperature of 86°-88° F. 



Incubator or Couveuse. 

 (From Fullertori 's " Obstetric Nursing.") 



Incubous (in f -ku-bus) [incubus, lying upon]. In biol- 

 ogy, with the tip of one leaf lying flat over the base of 

 the next above. 



Incubus (in'-ku-bus) [L.]. I. Nightmare; ephialtes. 

 2. Formerly, a supposed male demon that beset 

 women, just as the succuba was supposed to consort 

 with men. I. vigilantium. See Day mare. 



Incudal (in^-ku-dal) [incus, anvil; incus]. Relating 

 to the incus. 



Incudate (ing'-ku-dat) [incus, incus]. In biology, 

 having an incus. 



Incudo- (ing' -kit-do-) [incus, incus]. In composition, 

 signifying relationship to the incus. I.-malleal, re- 

 lating to the incus and the malleus. I. -orbicular, re- 

 lating to the incus and the orbicularis. I. -stape- 

 dial, relating to the incus and the stapes. I. -tym- 

 panic, relating to the incus and the tympanum. 



Incuneation (in-ku-nc --a' -shun) [incuneatio, a wedg- 

 ing]. I. The impaction of a fracture or of the fetal 

 head. 2. The same as Gomphosis. 



Incurable (in-kiir'-a-bl) [in, not; curare, to care for]. 

 That which cannot be cured or restored to wholeness. 



Incurvation (in-kur-va' -shun) [incurvare, to bend]. 

 The state of being bent or curved in. 



Incus (ing'-kus) [L. , an anvil: //. , Incudes']. In bi- 

 ology : (a) The middle one of the chain of bones in 



the middle ear of a mammal ; (b) A portion of the 

 mouth -parts of a rotifer. 



Indazole (in'-da-zbl), C 7 H 6 N 2 . A substance formed 

 by heating hydrazin-cinnamic acid. It crystallizes 

 from hot water in colorless needles, melting at 146 

 C. , and boiling at 270 C. 



Indecent (in-de' '-sent) [indecens, unbecoming]. Not 

 decent ; obscene. I. Exposure. See Exhibitionism. 



Indecision (in-de-sizh' -un) [in, not; decisio ; decidere, 

 to decide]. Morbid irresolution ; want of firmness or 

 of will ; abulia or hypobulia. 



Indehiscent (in-de-his' -ent) [in, not ; hiscere, to gap]. 

 In biology, not opening spontaneously. 



Indene (in-den'), C 9 H 8 . A hydrocarbon that occurs 

 with coumarone in that fraction of coal-tar boiling at 

 I76°-i82° C. It is a clear oil, boiling at iyj°-ijS 

 C. Its sp. gr. is 1.040 at 15 C. 



Indentation (in-den-ta' '-shun) [in, in ; dens, a tooth]. 

 A condition of being notched or serrated. I. of 

 Tongue, the notching of the borders of the tongue 

 made by the teeth, and visible especially during in- 

 flammation of the tongue. 



Index (in'-deks) [L.]. The first finger. Also, the re- 

 lation or ratio of one part to another, taken as a 

 standard. I., Altitudinal, the height of a skull 

 multiplied by 100 and divided by its length. I., 

 Alveolar, the degree of prominence of the jaws, 

 measured by the basi-alveolar length multiplied by 100 

 and divided by the basi-nasal length. When the 

 alveolar index is less than 98, the skull is orthognathic, 

 when more than 103, prognathic, when intermediate, 

 mesognathic . I., Basilar. Same as /., Alveolar. 

 I. of Breadth. Same as / , Cephalic. I., Cephalic, 

 the breadth of a skull multiplied by 100 and divided 

 by its length. When this is below 75, the skull is 

 called dolichocephalic, when above 80, it is called 

 brachy cephalic, between these limits, mesaticephali:. 

 I., Cephalo-orbital, the ratio of the solid contents 

 of the two orbits to the contents of the cranial cavity, 

 multiplied by 100. I., Cephalo-spinal, the ratio of 

 the measure of the foramen magnum in square milli- 

 meters to that of the cranial cavity in cubic centi- 

 meters, multiplied by 100. I., Cerebral, the ratio of 

 the greatest transverse to the greatest antero-posterior 

 diameter of the cranial cavity, multiplied by 100. 

 I. -digit, the forefinger. I., Facial, the ratio of the 

 distance of the ophryon from the alveolar point to the 

 transverse diameter measured from one zygoma to tht 

 other, multiplied by IOO. I. -finger, the forefinger. I., 

 Gnathic, the ratio of the distance between the basion 

 and the alveolar point to the distance between the 

 basion and the nasal point, multiplied by 100. I.. 

 Nasal, the greatest nasal width multiplied by 100, and 

 divided by the nasal length. When the nasal ind 

 ceeds 53, the nose is platyrhine, when less than 

 is said to be leptorhine, if between these numbers, MjM 

 rhine. I., Orbital, the orbital height multiplied 

 and divided by the orbital width, if the orbital ind 

 above 89, it is called megaseme, if under 84, mien 

 if between, mesoseme. I., Refractive, the coefficie 

 of refraction. I., Thoracic, taken at its widest part i> 

 100 times the sagittal, divided by the trans 

 measurement. I., Vertical, of Height, the ral 

 the vertical diameter of the skull to the maximum 

 antero-posterior diameter, multiplied by 100. 



India (iu'-dc-ah) [Asiatic]. A country of Asia. I 

 Liver, a condition of hyperemia and enlargement of 

 the liver, associated with general anemia and each 

 cyanosis, anasarca, and irritable and irregulai pulsi 

 I. -rubber, the prepared concrete juice obtained mainl 

 from an Indian tree, Fiats elasticity and a 

 American tree, Siphonia elastica. It is valuable 



