[NSTIPI LATE 



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[NTENSITY 



Instipulate [in-stip' -u-lat) [in, without ; \tipula, a 

 stalk]. In biology, without stipules. 



Institute [in'-stit-ut) [instituere, to set up]. A state- 

 ment of principles. Also, any establishment for the 

 statement or dissemination of principles. Institutes 

 of Medicine, the explanation or philosophy oi the 

 laws of the science ol medicine, physiology, pathol- 

 ogy, therapeutics, and hygiene, or the general and 

 elementary principles oi the same. The term is used 

 sometimes as a synonym >>i physiology. 



Instrument {in' -stru-ment) \instrumentum ; ins/run,-, 

 to build]. Any mechanical tool or device used in 

 operation or treatment. I., Exploring, for examin- 

 ing teeth to ascertain the work necessary to l>e done ; 

 more especially for determining the presence of cane.-, 

 of the teeth. 



Instrumentarium {in-stru-men-ta* -re-utri) [I-]. A 

 supply or collection of surgical, dental, or other in- 

 struments. 



Instrumentation {in-stru-men-ta' -shuri) [instrumen- 

 tum, an instrument]. The care and management of a 

 surgeon's instruments. 



Insuccation {in-suk-a' -shuri) [m, into; succus, juice]. 

 The Steeping of a drug for a considerable time in water 

 before using it in any pharmaceutic process. 



Insufficiency [in-suf-Jisld-en se) [insufflcientia ; in, 

 not; sub, under; facere, to make]. Incapacity of 

 normal action, on account of some deficiency, as of 

 size; the quality of not being sufficient for a special 

 function or duty. In ophthalmology, a disturbance of 

 equilibrium of the ocular muscles, that is overcome by 

 the effort of binocular vision, and so does not produce 

 strabismus. It is also called latent or dynamic squint. 

 I., Aortic. See Endocarditis. I. of the Cardiac 

 Valves, imperfect closure, permitting regurgitation. 

 I. of the Externi, or esophoria; the internal recti 

 ocular muscles are more powerful than the externi, or 

 more accurately, the power of adduction, or conver- 

 gence, is excessive. I. of the Interni, or exophoria; 

 the external recti are predominant or the power of ad- 

 duction is subnormal. I. of Muscles, Active, a phe- 

 nomenon of amuscle acting on two or more joints when 

 the joints over which it passes are so changed that it 

 cannot contract actively any further than to the extent ot 

 the shortening from which it begins to be active. I. of 

 Muscles, Passive, the analogue of the phenomena 

 of active insufficiency whereby motion of the part is pre- 

 vented from the position of the joint, the muscle being 

 too short to act under such circumstances. I. of the 

 Ocular Muscles, heterophoria, or unbalance ; high 

 degrees result in strabismus, diplopia, asthenopia, 

 etc. I., Mitral. See Endocarditis. I., Pulmon- 

 ary. See Endocarditis. I., Tricuspid. See Edno- 

 carditis. 



Insufflation {in-suf-fla' -shuri) [insufflare ; in, in; 

 sufflare, to puff]. The blowing ,,f any finely divided 

 substance upon a surface or into a cavity, or the filling 

 of any cavity with air, gas, or vapor. 



Insufflator [in' ' -suf-ld-tor) [in, in ; sufflare, to blow]. 

 A small instrument for blowing fine powders into a 

 cavity or on a surface. Also, one for blowing air into 

 the lungs. 



Insula {in'-su-lah) [L.]. I. In anatomy, the island of 

 Reil. 2. Any detached part or exclave of an organ. 

 3. A blood-islet, or island. See Island. 



Insular (in'-su-lar) [insula, an island]. Isolated in 

 condition ; also, pertaining to the I -land of Reil. I. 

 Sclerosis, Disseminated, Cerebrospinal, or Multiple 

 Sclerosis. A disease characterized by scattered islets 

 of sclerosis in the brain and cord. It "is called sclerose 

 en plaques disseminees by the French, and multiple 

 sclerosis by the Germans. It is distinctly a disease of 



early adult life, and is of about equal frequency in the 

 two sexes. The causes are obscure. The disease has 

 been observed to follow infectious diseases, 1 xposure 

 to wet and cold, and traumatism. In some cases a 

 neuropathic predisposition has been present. The 

 symptoms varj a< 1 ording to the situation of the is! 

 the most common arc motor derangement, a jei 

 tremor, paresis or paralysis, and ocular symptoms, 

 diplopia and amblyopia, with nystagmus, and 1 .< 1 asion- 

 allv atrophy of the discs. The tremor is ordinarily 

 absent during repose, but appears on attempted move- 

 ment, and i- hence designated, intention tremor. The 

 speet h is a characteristic one, very slow, each syllable 

 being pronounced with difficulty ; hence it is said to 

 be of a" scanning"" nature. Vertigo is also averyfre- 

 quent symptom, and in the advanced stage the mind 

 undergoes deterioration, and dementia may make its 

 appearance. The knee-jerks are exaggerated and ankle- 

 clonus is present. The lesions of the disease are small 

 grayish or yellow gelatinous patch red thn >ugh- 



out the brain and in both the white and gray matter 

 of the cord. 



Insulate (in'-su-ldt) [insulare, to make like an island]. 

 To isolate or separate from surroundings. In elec- 

 tricity, to surround a conductor with a non-conducting 

 substance or with one having an exceedingly high 

 degree of resistance. 



Insulation {in-su-la' -shuri) [insulatio ; insulare, to 

 make like an island]. The process of insulating ; the 

 state or quality of being insulated. 



Insult {in' -suit) [insult us : in, upon; sal/are, to 

 leap]. The beginning of a paroxysm or of an 

 attack of a disease. I., Apoplectic, an apoplectic 

 stroke. 



Insusceptibility {in-sus-sep-tib-il' -it-e) [insusceptibilis, 

 not susceptible]. Absence of contagious quality; it 

 differs from Immunity in being applied to the disease 

 instead of the person. 



Integer {in'-te-ger) [L.]. An entity. I., Fissural, 

 a term designating a fissure of the brain, which 

 is independent in some species or individuals, 

 and deepest at or about the middle of its length, 

 corresponding nearly with the place of first appear- 

 ance. 



Integral {in' -te-gral) [integer, whole]. Entire; es- 

 sential. 



Integration {in-te-gra 1 '-shuri) [integratio, a renewing]. 

 The blending of separate parts into one, as in the 

 embryo. 



Integrity {in-teg' -rit-e) [integrities : integer, whole]. 

 Wholeness; entirety. Also, virginity. 



Integument [in-teg' -u-ment)\integumentum : in, upon ; 

 t re. to cover]. A covering, especially the skin. 

 In botany, the envelop surrounding the ovule of 

 phanerogamous plants. I., Fetal, the fetal mem- 

 branes. 



Intellect {in' -tel-ekt) [intellectus ; [inter, between; 

 legere, to choose]. The mind or reasoning power. 

 I., Deranged. See Insanity. 



Intelligence (in-tel'-ij-ence) [intelligentia, intelligence]. 

 The understanding that comes from the perception of 

 qualities and attributes of the objective world, and is 

 manifested in the purposive employment of means to 

 attain an end. 



Intemperance (iu-tem'-per-aus) [in. not ; temperan- 

 tia. mildness]. Want of moderation ; immoderate 

 indulgence, especially with reference to alcoholic 

 liquors. 



Intensity [in-ten' -sit-e] [intensus, stretched, strung]. 

 Concentration of energy or activity. Also, a high 

 degree of energy or power. I., Specific. See Spe- 

 cific. 



