|
|
nyctophobia |
Noun
|
a morbid fear of night or darkness |
|
|
nosebleed |
Noun
|
bleeding from the nose |
|
|
nervous strain |
Noun
|
(psychology) nervousness resulting from mental stress |
|
|
nihilistic delusion |
Noun
|
the delusion that things (or everything, including the self) do not exist |
|
|
neurotic depression |
Noun
|
a term used for any state of depression that is not psychotic |
|
|
nihility |
Noun
|
the state of nonexistence |
|
|
namelessness |
Noun
|
the state of being anonymous |
|
|
nudity |
Noun
|
the state of being without clothing or covering of any kind |
|
|
nudeness |
Noun
|
the state of being without clothing or covering of any kind |
|
|
notoriety |
Noun
|
the state of being known for some unfavorable act or quality |
|
|
ne plus ultra |
Noun
|
the state of being without a flaw or defect |
|
|
nemesis |
Noun
|
something causing misery or death |
|
|
nonbiodegradable pollution |
Noun
|
pollution that accumulates in the environment and may appear in the food chain |
|
|
noise pollution |
Noun
|
annoying and potentially harmful environmental noise |
|
|
nanism |
Noun
|
a genetic abnormality resulting in short stature |
|
|
natural immunity |
Noun
|
immunity to disease that occurs as part of an individual's natural biologic makeup |
|
|
nanocephaly |
Noun
|
an abnormally small head and underdeveloped brain |
|
|
naphthalene poisoning |
Noun
|
toxic condition resulting from inhaling or ingesting naphthalene |
|
|
nicotine poisoning |
Noun
|
toxic condition caused by the ingestion or inhalation of large amounts of nicotine |
|
|
nephroptosis |
Noun
|
prolapse of the kidney |
|
|
nephroptosia |
Noun
|
prolapse of the kidney |
|
|
nerve deafness |
Noun
|
hearing loss due to failure of the auditory nerve |
|
|
nearsightedness |
Noun
|
(ophthalmology) eyesight abnormality resulting from the eye's faulty refractive ability |
|
|
nongonococcal urethritis |
Noun
|
sexually transmitted urethritis (usually caused by chlamydia) |
|
|
nonspecific urethritis |
Noun
|
inflammation of the urethra of unknown cause |
|
|
nyctalopia |
Noun
|
inability to see clearly in dim light |
|
|
night blindness |
Noun
|
inability to see clearly in dim light |
|
|
neotony |
Noun
|
the state resulting when juvenile characteristics are retained by the adults of a species |
|
|
non-ionic detergent |
Noun
|
a class of synthetic detergents in which the molecules do not ionize in aqueous solutions |
|
|
nanotube |
Noun
|
a fullerene molecule having a cylindrical or toroidal shape |
|
|
noble gas |
Noun
|
any of the chemically inert gaseous elements of the helium group in the periodic table |
|
|
neodymium |
Noun
|
a yellow trivalent metallic element of the rare earth group |
|
|
neon |
Noun
|
a colorless odorless gaseous element that give a red glow in a vacuum tube |
|
|
neptunium |
Noun
|
a radioactive transuranic metallic element |
|
|
niobium |
Noun
|
a soft grey ductile metallic element used in alloys |
|
|
nitrogen |
Noun
|
a common nonmetallic element that is normally a colorless odorless tasteless inert diatomic gas |
|
|
nobelium |
Noun
|
a radioactive transuranic element synthesized by bombarding curium with carbon ions |
|
|
noble metal |
Noun
|
any metal that is resistant to corrosion or oxidation |
|
|
nepheline |
Noun
|
a whitish mineral consisting of sodium aluminum silicate or potassium aluminum silicate in crystalline form |
|
|
nephelite |
Noun
|
a whitish mineral consisting of sodium aluminum silicate or potassium aluminum silicate in crystalline form |
|
|
nephelinite |
Noun
|
an igneous rock consisting of nepheline and pyroxene |
|
|
nephrite |
Noun
|
an amphibole mineral consisting of calcium magnesium silicate in monoclinic crystalline form |
|
|
niobite |
Noun
|
a black mineral that is an ore of niobium and tantalum |
|
|
nitrocalcite |
Noun
|
the mineral form of calcium nitrate |
|
|
nuclear fuel |
Noun
|
fuel (such as uranium) that can be used in nuclear reactors as a source of electricity |
|
|
nerve growth factor |
Noun
|
a protein that is involved in the growth of peripheral nerve cells |
|
|
nucleoprotein |
Noun
|
any of several substances found in the nuclei of all living cells |
|
|
nicotine |
Noun
|
an alkaloid poison that occurs in tobacco |
|
|
nitrogen dioxide |
Noun
|
a highly poisonous brown gas (NO2) |
|
|
nitric oxide |
Noun
|
a poisonous red-brown gas; chemical formula is NO |