NATURALIA 



838 



NECROCEDIA 



inflammable gases that is found issuing from the earth 

 in various localities. It consists essentially of methane, 

 with small quantities of hydrogen, carbon monoxid 

 and dioxid, and some nitrogen. N. History, a term 

 including a description of all the products and phe- 

 nomena of nature, but now usually restricted to the 

 sciences of zoology and botany. N. Order, one of 

 the divisions in the classification of both animals and 

 plants, varying in its technical meaning according to 

 the system of classification. N. Philosophy, the 

 science treating of the physical properties of matter at 

 rest and in motion. It is now usually called Physics. 

 N. Selection. See Evolution. 



Naturalia (nat-u-ra' -le-ah) [natura, nature]. The 

 genitalia. 



Naturalism (naf '-u-ral-izm) [natura, nature]. The 

 expectant method of treating disease. 



Naturalization (nat-u-ral-iz-a' '-shun) [natura, nature]. 

 The process by which a plant or an animal trans- 

 ferred from its natural habitat adapts itself to its new 

 surroundings. 



Naturalized (naf ' -u-ral-lzd) [natura, nature]. Relat- 

 ing to naturalization. 



Nature (na'-tur) \_natura, birth, origin]. The aggre- 

 gate action and product of many natural laws (Dar- 

 win). The energy by which the innumerable phe- 

 nomena that fall daily under observation are produced. 

 The word is loosely used as covering indiscriminately 

 both biologic and non-living phenomena. 



Naturism {na' '-tur-izm) . Synonym of Naturalism. 



Naupathia (iiaw-pa' -the-ah) [vavc, ship ; TraOoc, sick- 

 ness]. Seasickness. 



Nauplius {ttaw / -ple-us) [vavc, a ship ; nheiv, to sail]. 

 In biology, the earliest recognizable form of the crus- 

 tacean larva, having an unsegmented ovate body, a 

 median frontal eye, and three pairs of natatory feet, of 

 which the anterior are simple and the other two bira- 

 mose. N. Eye, the unpaired eye of all larval Crus- 

 taceans, and retained in the adult Entomoslraca. 



Nausea (natv'-ze-ah) [nausea, vavaia, seasickness]. 

 Sickness at the stomach, with inclination to vomit. 

 N. marina, N. navalis, seasickness. 



Nauseant (naiv'-ze-ant) [vavaia, seasickness]. I. Nau- 

 seating ; producing nausea. 2. Any agent that pro- 

 duces nausea. 



Nauseating (iiaw'-ze-a-ting). Synonym of A T auseous. 



Nauseous (naw'-ze-us, or nawz'-yus) [vavaia, seasick- 

 ness]. Producing nausea, or loathing. 



Nautomania (na-c-to-ma'-ne-ah) [yavr//g, sailor; fiavia, 

 madness]. A kind of homicidal madness said by 

 some writers to exist among sailors. 



Navel (na'-vl) [ME., navel, navel]. See Umbilicus. 

 N.-ill, a disease of calves, in which the navel be- 

 comes inflamed and the adjacent parts red and 

 swollen. N. -string, the umbilical cord. 



Navicula (na-vik'-u-lah) [dim. of navis, ship]. A 

 genus of diatoms of many species, some of which 

 have the frustules marked with very minute stria;, the 

 definition of which is sometimes taken as a test of the 

 power of microscopes. 



Navicular (na-vik'-u-lar) [navicula, a little ship]. 

 Boat-shaped. N. Bone. See Scaphoid. N. Fossa, 

 applied to several cavities, especially to a depression 

 between the vaginal aperture and the fourchet, and 

 to a dilatation of the urethra near the glans penis. N. 

 Sheath, the synovial membrane covering the navicular 

 bone in ungulates, as in the horse. 



Naviculoid (nav-ik'-u-loid) [navicula, a small boat ; 

 elfior, like]. Scaphoid. 



Naviform (na'-vif-orm) [navis, ship ; forma, form]. 

 Boat-shaped ; scaphoid. 



Navis (na'-vis) [navis, ship]. The vulva. 



Navy-blue. Same as Prussian Blue and Soluble' Bit 



Neale's Lung. An apparatus devised for the purpo 

 of removing the carbon dioxid and ammonia frc 

 the vitiated atmosphere of a room. It is also call 

 Neale's Chemical Lung. 



Nealogy (ne-al'-o-je) [veaM/g, young, fresh ; '/6y< 

 science]. In biology, the doctrine of the morphofl 

 correlations of a young organism. 



Neanderthaloid (na-ahn' ' -der-tahl-oid) [from .W-aud, 

 thai in Rhenish Prussia]. Resembling the (prehi 

 toric) Neanderthal skull, a noted skull found ne 

 Bonn, in Germany. A term used in craniology ai 

 anthropology. 



Neapolitan Fever. See Mediterranean / 

 Ointment, blue ointment ; mercurial ointment. 



Near (ner) [ME., nere, near]. I. Being close by, n 

 distant. 2. Closely akin. 3. The left side of ; 

 animal as distinguished from the "off," or the rig 

 side. N. Point. See Punctum proximum. N.-sigh 

 N.-sightedness. See Myopia. 



Nearthrosis (ne-ar-thro' -sis) [vkoc, new ; apdpvik 

 joint]. A new and abnormally-produced articulatio: 

 in the sequence of a fracture, dislocation, or disea: 

 of the bone. 



Neat (net) [ME., neet, an ox or cow]. Cattle of tl 

 bovine genus. N.'s-foot Oil, Oleum btibulum, 

 prepared from ox-feet collected from the slaughte 

 houses. It is a clear, yellowish oil of specific gravii 

 .916 at 15 C. It does not congeal until below 32 F 

 and is not liable to become rancid. It is of gre 

 value as a lubricant, and is used for softening leathi 

 and in the grinding of metals. It is recommended as 

 substitute for cod-liver oil. Unof. 



Nebula (neb'-u-lah) [L. , a cloud]. A faint, grayi- 

 opacity of the cornea. When more pronoui 

 called Leukoma. 



Nebulization (neb-u-liz-a' -shun) . Synonym 1 1 

 lion . 



Nebulizer (neb' -u-li-zer) [nebula, a cloud]. An instr 

 ment intended to produce a spray, and then to bre. 

 this up into a veritable nebula by impact against tl 

 wall of the containing vessel or other conveni 

 obstacle. It is a valuable form of inhaler in tube 

 culosis. See Atomizer. 



Nebulose (neb'-u-loz) [nebula, irist, a cloud]. Inbk 

 ogy, having cloudy markings. 



Necessity, Triangle of. See Triangle, Carotid, I 

 ferior, in Triangles , Table of. 



Neck (nek) [ME., necke, neck]. The constrict^ 

 portion of the body connecting the head with t 

 trunk ; also, the narrow portion of any structu 

 serving to join its parts. See Cervix. N., An | 

 tomic, the constricted portion of the humerus, ji 

 below the articular surface, serving for the attachrae 

 of the capsular ligament. N., Derbyshire. Synooj 

 of Goiter. N., Nithsdale. Synonym of G 

 rest, in massage, having the hands joined behind t 

 neck. N., Surgical, the constricted part ol I 

 humerus just below the condyles. N.,Wry-. Synon; 

 of Torticollis. 



Necrectomy (nek-rek'-lo-me)[veKpog, dead ; f/cro/4«| 

 sion]. The excision of the necrotic conductors of sou I 

 in chronic purulent otitis media; in a more general sen 

 any removal of necrosed material by a cutting operati< 



Necrencephalus (nek-ren-sef '-al-us) | 

 eyKtQahor, brain]. Softening of the brain. 



Necrobiosis (nek-ro-bi-o' '-sis) [veupdr, dead ; 

 Molecular death of a tissue. 



Necrobiotic (nek-ro-bi-o/' -ik) [vtsplir, dead; 

 Pertaining to or causing necrobiosis. 



Necrocedia (nek-ro-se' -de-ah) [vwpoq, corpse; * 

 care]. The process of embalming. 



