oriel
A large polygonal recess in a building, such as a bay window, forming a protrusion on the outer wall.
A small apartment next to a hall, used for dining.

oriels
plural of oriel

orientator
An instrument for orientating.

orientators
plural of orientator

orison
A prayer.
Mystical contemplation or communion.

orisons
plural of orison

orizon
Obsolete spelling of orison.

orizons
plural of orizon

ormesine
Alternative form of armozeen.

ormesines
plural of ormesine

ormolu
Golden or gilded brass or bronze used for decorative purposes.

ormolus
plural of ormolu

orograph
A machine for use in making topographical maps, operated by being pushed across country, and recording distances and elevations.

orographs
plural of orograph

oropharyngeal
Of or pertaining to both the mouth and the pharynx.
Of or pertaining to the oropharynx.

oropharyngeals
plural of oropharyngeal

orthobiologic
A biological material used to improve the healing of broken bones and injured muscles, tendons and ligaments

orthobiologics
plural of orthobiologic

orthodiagraph
An instrument used to determine the true contour and dimensions of any internal organ or other object rendered visible by X-rays, the latter being deflected so as to be made parallel.

orthodiagraphs
plural of orthodiagraph

orthopantomograph
A panoramic dental X-ray device

orthopantomographs
plural of orthopantomograph

orthoptics
The study and treatment of muscular irregularities of the eye.

orthoscope
An instrument for examining the interior of an eye.
An instrument for drawing projections of a skull.

orthoscopes
plural of orthoscope

oryall
Obsolete form of oriel.

oryalls
plural of oryall

osbipy
A compound, formed from osmium tetroxide and 2,2'-bipyridine, used to label thymidine during electrophoresis

oscilloclast
A device that was supposed to diagnose cancer from tissue samples.

oscilloclasts
plural of oscilloclast

oscillograph
An instrument for measuring alternating or varying electric current in terms of current and voltage; an oscilloscope.

oscillographs
plural of oscillograph

osculometer
An instrument consisting of a series of arcs of known curvature, for comparison with other curves.

osculometers
plural of osculometer.

osmograph
An instrument for recording the height of the liquid in an endosmometer or for registering osmotic pressures.

osmographs
plural of osmograph

osmoprotection
The mechanism by which the cells of an organism protect themselves against osmotic stress.

osmoscope
An instrument for detecting and for measuring odors.
An instrument for measuring osmosis.

osmoscopes
plural of osmoscope

osmostat
The mechanism, in the hypothalamus, that regulates osmolality by the secretion of antidiuretic hormone

osmostats
plural of osmostat

osteofluorochrome
A form of fluorochrome used to stain bone tissue

osteometer
A measuring instrument used in osteometry

osteometers
plural of osteometer

osteophone
An instrument for transmission of auditory vibrations through the bones of the head, so as to be appreciated as sounds by persons deaf from causes other than those affecting the nervous apparatus of hearing.

osteophones
plural of osteophone

osteosyntheses
plural of osteosynthesis

osteosynthesis
The reduction and fixation of a bone fracture with implantable devices, usually made of metal

osteotome
A medical tool used for cutting or marking bone, used in dental implantation.
A kind of bone saw used in the 19th and early 20th centuries.

osteotomes
plural of osteotome

ostraca
plural of ostracon

ostracon
A piece of pottery or stone, usually broken off from a vase or other earthenware vessel, especially one used to cast a vote during the Ancient Greek process of ostracism.

ostraka
plural of ostrakon

ostrakon
Alternative form of ostracon.

otacousticon
An instrument to aid hearing, such as an ear trumpet or hearing aid.

otacousticons
plural of otacousticon

otaman
Alternative form of ataman.

otamans
plural of otaman

otheoscope
An instrument for exhibiting the repulsive action produced by light or heat in a vacuum; a modification of the radiometer.

otheoscopes
plural of otheoscope

otoendoscope
An endoscope used to examine the middle ear

otoendoscopes
plural of otoendoscope

otomicroscope
An otoscopic microscope

otomicroscopes
plural of otomicroscope

otoscope
An instrument used for examining the eardrum and interior of the outer ear.

otoscopes
plural of otoscope

oustiti
A marmoset.
A tool for opening a locked door by turning an inner key from the outside.

oustitis
plural of oustiti

outhaul
To haul out.

outhauler
Synonym of outhaul.

outhaulers
plural of outhauler

outhauls
plural of outhaul

outlet
A vent or similar passage to allow the escape of something.
Something which allows for the release of one's desires.
A river that runs out of a lake.
A shop that sells the products of a particular manufacturer or supplier.
A wall-mounted socket connected to an electrical power supply, at which current can be taken to run electrical devices.

outlets
plural of outlet

outlett
Obsolete spelling of outlet.

outletts
plural of outlett

outscriber
A magnetic recording device that serves as a buffer for data being transmitted from computer to printer, to reduce delays in printing.

outscribers
plural of outscriber

outsight
Sight for that which is on the outside; the ability or capacity to perceive or anticipate external things; view; outlook; perspective; power of observation.
Expectation; prospect.
Movable goods kept out of doors, such as animals, ploughs, carts, and other implements of husbandry.

outsights
plural of outsight

ouze
Mud.

oven
A chamber used for baking or heating.
A very hot place.

ovens
plural of oven

ovenware
Cooking utensils that can be safely used in an oven.

ovenwares
plural of ovenware

ovenwood
wood used to light an oven

overclockings
plural of overclocking

overcode
A code used to represent multiple (possibly unrelated) data items.
An established code (signifier) that also acts as a new code, either representing additional (related) meanings, or dividing into various nuances of the original meaning.
Inventory that can no longer be sold (such as items that are past their sell-by date).

overcodes
third-person singular simple present indicative of overcode

overcooler
A device for cooling a substance to a temperature below its normal level.

overcoolers
plural of overcooler

overcutter
A device used to cut into rock walls from above.

overcutters
plural of overcutter

overedger
An overlocker.

overedgers
plural of overedger

overladies
plural of overlady

overlocker
A device for overlock stitching.

overlockers
plural of overlocker

overmount
Mounted over something else.

overmounts
third-person singular simple present indicative of overmount

oversampler
A device used to oversample a signal

oversamplers
plural of oversampler

overseamer
A machine for overseaming.

overseamers
plural of overseamer

overwrapper
A machine that wraps a packaged item in a secondary outer wrapping.

overwrappers
plural of overwrapper

ovitrap
A device that resembles the preferred breeding site of mosquitoes, used to attract them and capture their eggs in scientific studies.

ovitraps
plural of ovitrap

oxadiazolo
A functional group consisting of oxadiazole fused to another ring compound.

oxanorbornene
Any of several oxygen-containing heterocycles derived from norbornene, especially those that are used to make polymers

oxanorbornenes
plural of oxanorbornene

oxantel
A particular kind of anthelmintic that is used to cure intestinal parasites.

oxanthrene
The tricyclic heterocycle consisting of two benzene rings fused to that of a dioxin ring

oxanthrenes
plural of oxanthrene

oxidator
An oxidizer.
A device for causing a current of air to impinge on the flame of the Argand lamp.

oxidators
plural of oxidator

oxidizer
An oxidizing agent, especially one used to oxidize the fuel of a rocket or a fuel cell.

oxidizers
plural of oxidizer