I 



NYCHTHEMERON 



881 



NYXIS 



soluble in water. Dose gr. sV - ^- Liq. s. hydro- 

 chlorat. [B. P.) Dose Tn„v-x. 



<Iychthemeron (nik-them' -er-ori) [vif , night ; r/fiipa, 

 dav]. A day and a night. 



-Jychthemerous (nik-them' -er-us) [vt£, night; f/Lupa, 

 dav]. Pertaining to night and day ; ephemeral. 



Nyctalopia {nik-tal-o' '-pe-ah) \y'vi, night ; u\b, the eye]. 

 Night-vision ; the condition in which the sight is 

 better by night or in semi-darkness than by daylight. 

 It is a symptom of central scotoma, the more dilated 

 pupil at night allowing a better illumination of the 

 peripheral portions of the retina. Dr. Greenhill and 

 Mr. Tweedy have shown that according to the quite 

 universal usage of modern times, the definitions of the 

 words, nyctalopia and hemeralopia, have been the 

 reverse of that of the early Greek and Latin writers. 

 The proper derivation therefore of nyctalopia would be 

 from I'i'f , night, d/aof , blind, uip, eye, the word mean- 

 ing night-blindness. Hemeralopia was likewise derived 

 from Tjakpa, day, a?.a6g, blind, ui[>, eye, and meant 

 day blindness. The attempt to reinstate the ancient 

 usage can only result in utter confusion, and the words 

 should therefore never be used. See Hemeralopia. 

 yctamblyopia (nik-tam-ble-o / pe-ah) \yi'^, night; a/i- 

 i>iuT/a,dim-sightedness]. Imperfect vision at night, 

 yctegersia (nik-tej-er'-se-ah) [wf, night ; eyepaiq, a 

 rousing]. Nocturnal excitement. 



yctipelagic (nik-tip-el-af '-ik) [vfrf , night ; TTf/ayoc, 

 the sea]. In biology, pertaining to marine animals 

 that remain in the depths during the day and arise 

 to the surface only at night. See under Plankton. 

 yctipolus. Nyctiporus (nik-tip / -o-lus,nik-tip'-or-us). 

 Synonyms of Somnambulist. 



yctitropic (nik-tit-rop / -ik)\yi<^, night ; rpoTroc, a turn]. 

 In biology, applied to movements connected with the 



imenon called the " sleep of plants." 

 yctitropism \nik'-tit-ro-pizm) [wf, night ; rpoxog, a 

 :urn]. In biology, the "sleep of plants." 

 yctobadia, Nyctobatesis (nik-to-ba' -de-ah , nik-to- 

 bat-e'-sis). Synonyms of Somnambulism. 

 yctophobia (nik-to-fo'-be-ah) [vif, night; <p6pog, 

 tear] . Insane dread of the night, 

 /ctophonia (nik-to-fo'-ne-ah) [yv^, night; <bwi}, 

 voice]. The hysteric loss of the voice during the 

 lay. 



/ctotyphlosis (nik-to-tif-lo'-sis) [wf, night ; rio/xjoig, 

 blindness]. Night-blindness, 

 -'gma [nig' -tnah) [it; ud\. A punctured wound. 

 1 -lander's Solution and Test. See Tests, Table of. 

 Imph {nimf) [yvuori, a nymph]. In biology, the 



hrysalis or pupa of an insect. 

 1 •mpha ( nim' -/ah) [yvfityj, nymph : //. , Nympha\. A 

 abium minus the vulva. See Labium. 



56 



Nymphaea (nim-fe'-ah) [yvft$i/ t a nymph]. A genus 

 of plants including the water-lilies. N. odorata, 

 sweet-scented water-lily ; the root of the well-known 

 plant. It contains gallic and tannic acids, to which 

 its properties are due. It is bitter and astringent. A 

 decoction of J5J-OJ maybe used. Dose ^ ss-j, or a 

 fluid extract in doses of ^ss— j. The roots are em- 

 ployed in domestic practice in making poultices. Unof. 



Nymphitis (nim-fi'-tis) [yi/Kpa, nymph ; trig, inflam- 

 mation]. Inflammation of the nymphae. 



Nymphochrysalis (nim-fo-kris' '-al-is) [viifiprj, a nymph; 

 Xpvaa'/ug, the gold sheath of butterflies]. In biology, 

 the egg-like stage from which the nymphae of certain 

 mites are developed. 



Nympholepsy (nim' -fo-Up-se) [vi/upy, nymph ; "ktfKroq, 

 inspired, seized]. An exaltation, or ecstatic trance; 

 a religious frenzy. [Old.] 



Nymphomania (nim - fo - ma' - ne - ah) [vvfiorj, nymph; 

 ftavia, madness]. Excessive or furious sexual desire 

 on the part of a woman. It is called, also, Hystero- 

 mania, and Furor uterinus. 



Nymphomaniac (nim-fo-ma'-ne-ak) [vvpyr], nymph ; 

 uavia, madness]. One affected with nymphomania. 



Nymphoncus (nim-fong' -kus) [yiufyri, nymph; bynoq, 

 tumor]. Tumor of the nympha. 



Nymphosis (nim- fo' -sis) [yi-utpr/, a nymph ; specifically 

 the pupa of an insect]. In biology, the process of 

 changing into the nymph stage. 



Nymphotomy (nim-fof -o-me) [yi^rj, nymph ; tout/, a 

 cutting] . The surgical removal of one or both nymphae. 



Nyssa (nis'-ah) [TSvoa, the nurse of Bacchus]. A 

 genus of cornaceous trees ; gum trees ; tupelo or pep- 

 peridge. N. candicans, N. capitata, N. grandi- 

 dentata, and N. uniflora, are species of the U. S., 

 whose roots are used in making tupelo-tents. See 

 Tents and Tupelo. 



Nystagmus (nis-tag'-mus) [yvorayfioq, nodding of the 

 head]. An oscillatory movement of the eyeballs, 

 generally horizontal, inherited, and associated with 

 some other ocular abnormality, with albinism, or de- 

 pending on intracranial disease, especially meningitis 

 or multiple sclerosis. N., Lateral, oscillation of the 

 eyes in the horizontal meridian. N., Miner's, a 

 variety of nystagmus occurring in miners, due to the 

 irregular action of the ocular muscles as the eyes fol- 

 low the flickering light of candle or lamp, the miner 

 lying in an unnatural position. N., Rotatory, a 

 partial rolling of the eyeball around the visual axis. 

 N., Vertical, oscillatory movement in the vertical 

 meridian. 



Nystaxis (nis-taks'-is). Synonym of Nystagmus. 



Nyxis (niks'-is) [yi^ig, puncture]. Pertaining to sur- 

 gical puncture. 



