olivetta
A container used to hold olives.

olotera
A traditional Mexican tool consisting of bound, shortened corncobs, against which ears of corn are scraped against to remove their kernels.

oloteras
plural of olotera

olutasidenib
An anticancer medication used to treat relapsed or refractory acute myeloid leukemia.

ombrometer
A rain gauge

ombrometers
plural of ombrometer

ometer
A measuring instrument.

ometers
plural of ometer

omnigraph
A pantograph.
An automatic telegraph code-sound producer used to learn telegraph code.

omnigraphs
plural of omnigraph

omphali
plural of omphalus

omphaloi
plural of omphalos

omphalos
An ancient religious stone artifact, or baetylus, used to denote the direction of the "center" of the world.
The theological proposition that the world was created with certain indicia of a history which had not actually occurred (such as the humans who had never been connected to umbilical cords being created with navels).
The navel.
A raised central point; a boss.
The center or hub.

omphalus
Alternative form of omphalos.

oncograph
An instrument for registering the changes observable with an oncometer.

oncographs
plural of oncograph

oncometer
An instrument for measuring the variations in size of the internal organs of the body.

oncometers
plural of oncometer

oncosimeter
A device for measuring the specific gravity of a molten metal by recording on a band of paper the sinking or floating effect of a ball of the solid metal immersed in it.

oncosimeters
plural of oncosimeter

oncosuppressor
An oncosuppressive gene

oncosuppressors
plural of oncosuppressor

ondine
Alternative form of undine (“water-sprite”).

ondines
plural of ondine

ondograph
An instrument for autographically recording the waveforms of varying currents, especially rapidly varying alternating currents.

ondographs
plural of ondograph

ondometer
An instrument designed to measure wavelengths.

ondometers
plural of ondometer

ondoscope
An instrument that detects (and visualizes) the presence of high-frequency radiation

ondoscopes
plural of ondoscope

onek
A One-pronged fork.

oogenotop
The egg-forming apparatus in trematodes.

oogenotops
plural of oogenotop

oograph
A mechanical device for drawing the outline of a bird's egg.

oographs
plural of oograph

oometer
A device for the measurement of eggs.

oometers
plural of oometer

oord
Archaic form of urad.

oordh
Archaic form of urad.

oorud
Archaic form of urad.

oose
Fluff, particularly from a textile source such as cotton or wool.

ooser
A wooden horned mask used for folkloric and magical purposes. Possibly also the unknown creature upon which the mask was based.

oosers
plural of ooser

opalware
A form of opaque toughened glass used for dinnerware.

opcode
A mnemonic used to refer to a microprocessor instruction in assembly language.

opcodes
plural of opcode

opeidoscope
An instrument, consisting of a tube with one end open and the other end covered with a thin flexible membrane with a mirror attached to its centre, used for exhibiting upon a screen, by means of rays reflected from the mirror, the vibratory motions caused by sounds that enter the tube.

opeidoscopes
plural of opeidoscope

operabilities
plural of operability

operability
The extent to which a system or device is operable.

operameter
An instrument or machine for measuring work done, especially the number of rotations by a machine or wheel in manufacturing cloth.

operameters
plural of operameter

operation
The method by which a device performs its function.
The method or practice by which actions are done.
The act or process of operating (verb): agency; the exertion of power, physical, mechanical, or moral.
A planned undertaking.
A business or organization.
A surgical procedure.
A procedure for generating a value from one or more other values (the operands).
A procedure for generating a value from one or more other values (the operands).
A military campaign (e.g. Operation Desert Storm).
Effect produced; influence.

operations
plural of operation

ophthalmodynamometer
An instrument that is used to measure blood pressure in the blood vessels of the retina

ophthalmodynamometers
plural of ophthalmodynamometer

ophthalmometer
An instrument for measuring the size of a reflected image on the convex surface of the cornea and lens of the eye, by which their curvature can be ascertained, un order to assess astigmatism.

ophthalmometers
plural of ophthalmometer

ophthalmoscope
An instrument for examining the interior of the eye (that is, for ophthalmoscopy).

ophthalmoscopes
plural of ophthalmoscope

ophthalmostat
A device that holds the eye steady during an operation

ophthalmostats
plural of ophthalmostat

ophthalmotrope
An instrument for demonstrating the movements of the eye muscles

ophthalmotropes
plural of ophthalmotrope

opisometer
A device for measuring the length of curved lines, such as on a map.

opisometers
plural of opisometer

oplock
An opportunistic lock on a file system object, used for caching purposes rather than to avoid modifications by multiple users at once.

oplocks
plural of oplock

opmask
A bit mask used to select elements in vector processing.

opodeldoc
A kind of plaster, said to have been invented by Mindererus, used for external injuries.
A saponaceous, camphorated liniment; a solution of soap in alcohol, with the addition of camphor and essential oils.

opodeldocs
plural of opodeldoc

opposite
Located directly across from something else, or from each other.
Of leaves and flowers, positioned directly across from each other on a stem.
Facing in the other direction.
Of either of two complementary or mutually exclusive things.
Extremely different; inconsistent; contrary; repugnant; antagonistic.

opposites
plural of opposite

opration
Misspelling of operation.

optacon
An electromechanical device that selectively raises small rods over the darker parts of a document, and thus enables blind people to read printed material that has not been transcribed into Braille.

optacons
plural of optacon

optative
Expressing a wish or a choice.
Related or pertaining to the optative mood.

optatives
plural of optative

opthalmoscope
Misspelling of ophthalmoscope.

optic
Of, or relating to the eye or to vision.
Of, or relating to optics or optical instruments.

opticks
Obsolete form of optics.

optics
The physics of light and vision: basic optical science.
Technology that makes use of such physics: applied optical science; business lines making use of such technology.
The light-related aspects of a device.
Perception, image, public relations, especially in politics.

optigraph
A telescope with a diagonal eyepiece, suspended vertically in gimbals by the object end beneath a fixed diagonal plane mirror. It is used for delineating landscapes by means of an attached pencil.

optigraphs
plural of optigraph

optoelectrode
An optoelectric electrode

optoelectrodes
plural of optoelectrode

optofluidics
The science of optical devices incorporating fluids, especially such microfluidic devices

optoisolator
A device that transmits a signal optically between two isolated electronic circuits

optoisolators
plural of optoisolator

optomechanics
The design and manufacture of precision mechanical components of optical devices

optometer
An instrument for measuring the focus of the lens of the eye.

optometers
plural of optometer

optophone
A device that transforms light into sound.
A device, used by the blind, that scans text and generates a different sound for each character

optophones
plural of optophone

oraison
Obsolete form of orison.

orchidometer
An instrument used to measure the volume of the testicles

orchidometers
plural of orchidometer

orchiometer
Alternative form of orchidometer.

orchiometers
plural of orchiometer

orgasmatron
A hypothetical device capable of inducing orgasm.

orgasmatrons
plural of orgasmatron