Showing 1,901 to 2,000 of 3,038.
- NEPHALISTOne who practises nephalism; a teetotaller
- NEPHELITESynonym of nepheline.
- NEPHELOMETERAn instrument for measuring various aspects of the suspended particles in a fluid; especially in a colloid.
- NEPHELOMETRIESThe measurement of the concentration of a solution, suspension or dispersion based upon its light-scattering properties.
- NEPHRICRelating to or connected with a kidney.
- NEPHRITEA semi-precious stone, one of the two types of stone commonly referred to as jade (the other being jadeite).
- NERITICOf or relating to a marine environment of shallow waters.
- NETEIn Ancient Greek musical theory, the highest-pitched fixed note in the farther tetrachord on a lyre, always pitched a perfect fourth above the paramese, with two movable notes betw
- NEUMEAny of a set of signs used in early musical notation.
- NEURALOf, or relating to the nerves, neurons or the nervous system.
- NEURALGIAAn acute, severe, intermittent pain that radiates along a nerve.
- NEUROLEPTICAn antipsychotic drug.
- NEUROPILA fibrous network of nervous tissue that forms the gray matter of the brain
- NEUROTICAffected with a neurosis.
- NIPTERThe ecclesiastical ceremony of washing the feet; maundy.
- NIPTERSThe ecclesiastical ceremony of washing the feet; maundy.
- NITERA mineral form of potassium nitrate (saltpetre) used in making gunpowder.
- NOESISCognition, the functioning of intellect.
- NOETICOf or pertaining to the mind or intellect.
- NOMAA gangrenous disease of humans leading to tissue destruction of the face, especially the mouth and cheek.
- NOMADA member of a society or class who herd animals from pasture to pasture with no fixed home.
- NOMADICOf or relating to nomads. Of or related to itinerant herdsmen. Of or related to any habitually wandering person or animal.
- NOMARCHThe governor of an ancient Egyptian nome.
- NOMASA gangrenous disease of humans leading to tissue destruction of the face, especially the mouth and cheek.
- NOMEA prefecture or unit of regional government in Greece.
- NOMICCustomary; ordinary; applied to the usual spelling of a language, in distinction from strictly phonetic methods.
- NOMOSThe body of law, especially that governing human behaviour.
- NOOSPHEREThe sphere of human reason, thought, and consciousness, seen as a theoretical evolutionary stage.
- NOTAEUMThe back (upper surface) of a bird.
- NOTAEUMSThe back (upper surface) of a bird.
- NOTUMThe back; the dorsal side of the thorax in insects or nudibranches.
- NOUSThe mind or intellect, faculty for rationality or reason using the necessary common sense or awareness.
- NOUSESThe mind or intellect, faculty for rationality or reason using the necessary common sense or awareness.
- NUBILEOf an age suitable for marriage; marriageable (principally of a young woman).
- NUDGEA gentle push.
- NUMISMATICSThe study of coins, tokens, medals and paper money.
- NUMMARYOf or pertaining to coins or money.
- NYCTALOPIAThe inability to see clearly in dim light; night blindness
- NYMPHAny female nature spirit associated with water, forests, grottos, wind, etc.
- NYMPHAA nymph.
- NYMPHAEA, the European white water lily.
- NYMPHOLEPTA person in a state of nympholepsy.
- NYSTAGMUSRapid and excessive involuntary eye movement, usually lateral.
- OBELIplural of obelus
- OBELIAAny of various colonial marine hydroids of the genus Obelia.
- OBELIONA craniometric point on the sagittal suture between the parietal foramina near the lambdoid suture.
- OBELISKA tall, square, tapered, stone monolith topped with a pyramidal point, frequently used as a monument.
- OBELIZETo mark (a written or printed passage) with an obelus; to judge as spurious or doubtful.
- OBJECTA thing that has physical existence but is not alive.
- OBOLSynonym of obolus: a silver coin of Ancient Greece.
- OBOLUSA silver coin minted in Ancient Greece, valued at a sixth of a drachma.
- OCEANOne of the large bodies of water separating the continents.
- OCHREA clay earth pigment containing silica, aluminum and ferric oxide.
- OCTAHEDRONa polyhedron with eight faces; the regular octahedron has regular triangles as faces and is one of the Platonic solids.
- OCTAPLAA text presented in eight parallel versions, especially the version of the Bible presented in such a fashion by Origen.
- OCTAPODYA metre or verse of eight feet.
- OCTOPUSAny of several marine molluscs of the order Octopoda, having no internal or external protective shell or bone (unlike the nautilus, squid and cuttlefish) and eight arms each covere
- ODEONAn ancient Greek or Roman building used for performances of music and poetry.
- ODOMETERAn instrument, usually embedded within the speedometer of a vehicle, that measures the distance the vehicle has traveled since production.
- ODONATEAny carnivorous insect of the order Odonata; a dragonfly or damselfly.
- ODONTALGIAtoothache
- ODYLESynonym of od (“a hypothetical force or natural power, now proved not to exist, which was supposed by Carl Reichenbach and others to inhere in certain people and produce phenomena
- ODYSSEYAn extended adventurous voyage, usually in search of home.
- OECISTA founder of a colony.
- OGREA large, grotesque, brutish humanoid monster, typically marked by great strength and a propensity to kill or devour humans.
- OIDIUMA fragile spore produced by some fungi.
- OLEUMA solution of sulfur trioxide in sulfuric acid.
- OLIBANUMA gum resin from trees of the genus Boswellia, formerly used as a medicine and now mainly as incense.
- OLIGAEMIAThe condition of having a low quantity of blood.
- OLIGARCHA member of an oligarchy; someone who is part of a small group that runs a country.
- OLIGARCHYA government run by and for only a few, often the aristocracy, the wealthy, or their friends and associates.
- OLIGISTHematite
- OLIPHANTAn elephant.
- OLPEOriginally, a leather flask or vessel for oils or liquids; afterward, an earthenware vase or pitcher without a spout.
- OMEGAThe twenty-fourth letter of the Classical and the Modern Greek alphabet, and the twenty-eighth letter of the Old and the Ancient Greek alphabet, i.e. the last letter of every Greek
- OMOPHAGIAThe eating of raw food, especially raw flesh.
- OMOPHAGICEating raw flesh; using uncooked meat as food.
- OMOPLATEThe scapula.
- OMPHACITEAny of a range of green, monoclinic pyroxene minerals found in eclogites and similar rocks; they are solid solutions of jadeite and diopside.
- OMPHALOIDShaped like a navel.
- OMPHALOSAn ancient religious stone artifact, or baetylus, used to denote the direction of the "center" of the world.
- ONEIRICOf or pertaining to dreams.
- ONOMASTICOf or relating to a personal or place name.
- ONOSSynonym of epinetron (“Attic pottery item”).
- ONTICOntological.
- ONYXA banded variety of chalcedony, a cryptocrystalline form of quartz.
- OOIDA small calcium carbonate- or iron-coated grain found on the seafloor.
- OOMANCYDivination through the use of eggs.
- OPHICLEIDEA keyed brass baritone bugle, now replaced by the tuba in orchestral music
- OPHIDIANAny species of the suborder Serpentes; a snake or serpent.
- OPHIOLATRYsnake worship
- OPHIOLITEAn assemblage of mafic and ultramafic rock fragments of the ocean lithosphere that has been tectonically moved onto a continental margin or island.
- OPHITEAny of various rocks having snake-like markings, such as a mottled greenish porphyry.
- OPISOMETERA device for measuring the length of curved lines, such as on a map.
- OPSIMATHA person who learns late in life.
- OPSINAny of a group of light-sensitive proteins in the retina.
- OPTATIVEExpressing a wish or a choice.
- OPTICOf, or relating to the eye or to vision.
- OPTICSThe physics of light and vision: basic optical science.
- ORACHThe saltbush: any of several plants of the genus Atriplex especially Atriplex hortensis or Atriplex patula, found in dry habitats, that have edible leaves resembling spinach.