Select a letter for some words
Obi
A sash, esp. the long belt-like broad sash of soft material worn by women aound the waist when wearing a traditional kimono, and usually having a large bow at the back.
Obscurantism
The system or the principles of the obscurants.
Obstructionism
The act or the policy of obstructing progress.
Obtainable
Capable of being obtained.
Obtrusionist
One who practices or excuses obtrusion.
Obturator
That which closes or stops an opening.
Obtusangular
See .
Occrustate
To incrust; to harden.
Ocellate
Same as .
Octonary
Of or pertaining to the number eight.
Odize
To charge with od. See .
Odonata
The division of insects that includes the dragon flies.
Odontiasis
Cutting of the teeth; dentition.
Odorous
Having or emitting an odor or scent, esp. a sweet odor; fragrant; sweet-smelling.
Official
Of or pertaining to an office or public trust; .
officialese
the formal and often obscure style of writing characteristic of some government officials; bureaucratese; -- it is characterized by euphemisms, circumlocutions, vague abstractions, and circumlocutions.
off-roader
a bicycle with a sturdy frame and fat tires; originally designed for riding in mountainous country; amountain bike.
-oid
A suffix or combining form meaning , , ; .
oilcloth
Cloth rendered waterproof by treatment with oil or paint, and used for marking garments, covering tables, shelves, floors, etc.
oiled
Covered or treated with oil; dressed with, or soaked in, oil.
old-world
Characteristic of former times especially in Europe; .
Oleo oil
An oil expressed from certain animal fats (esp. beef suet), the greater portion of the solid fat, or stearin, being left behind. It is mixture of olein, palmitin, and a little stearin.
Oligo-
A combining form from Gr. , , , .
Olympianism
Worship of the Olympian gods, esp. as a dominant cult or religion.
Omitter
One who omits.
omnibus
Pertaining to or dealing with a variety of topics at one time; .
Omniscious
All-knowing.
one-horse
Drawn by one horse; having but a single horse; .
Oneiroscopist
One who interprets dreams.
one-sixth
a sixth part.
on-license
a license to sell liquor for consumption on the premises.
Onomatology
The science of names or of their classification.
Onstead
A single farmhouse; a steading.
Onward
Moving in a forward direction; tending toward a contemplated or desirable end; forward;
Opalescence
A reflection of a milky or pearly light from the interior of a mineral, as in the moonstone; the state or quality of being opalescent.
Ope
To open.
Openly
In an open manner; publicly; not in private; without secrecy.
operant conditioning
A process for causing animals to behave in a specific manner by rewarding or punishing the animal each time it performs a certain act; after a time, the animal comes to associate the reward or punishment with the act, and will increase or decrease the frequency of performing that act.
Operatory
A laboratory.
Ophthalmological
Of or pertaining to ophthalmology.
Opisometer
An instrument with a revolving wheel for measuring a curved line, as on a map.
Opisthion
The middle of the posterior, or dorsal, margin of the great foramen of the skull.
Opposeless
Not to be effectually opposed; irresistible.
Opsimathy
Education late in life.
Optative
Something to be desired.
Orangeat
Candied orange peel; also, orangeade.
Orangetawny
Deep orange-yellow; dark yellow.
Oratrix
A woman plaintiff, or complainant, in equity pleading.
orchestrated
Arranged for performance by an orchestra; -- of a musical composition.
Orderly
A noncommissioned officer or soldier who attends a superior officer to carry his orders, or to render other service.
Ordinary
According to established order; methodical; settled; regular.
Ordovian
Ordovician.
Organizability
Quality of being organizable; capability of being organized.
Orichalceous
Pertaining to, or resembling, orichalch; having a color or luster like that of brass.
Orientness
The quality or state of being orient or bright; splendor.
Originality
The quality or state of being original.
Oriole
Any one of various species of Old World singing birds of the family . They are usually conspicuously colored with yellow and black. The European or golden oriole (, or ) has a very musical flutelike note.
ornamentally
By way of ornament.
Orography
That branch of science which treats of mountains and mountain systems; orology; .
orthopist
One who is skilled in orthopy.
Orthopedy
Same as .
Oryzopsis
A genus of grasses incluiding rice grass.
Osmidrosis
The secretion of fetid sweat.
Ossific
Capable of producing bone; having the power to change cartilage or other tissue into bone.
Ostein
Ossein.
Osteozoa
Same as .
Ottar
See .
Out
One who, or that which, is out; especially, one who is out of office; -- generally in the plural.
Outargue
To surpass or conquer in argument.
Outcast
Cast out; degraded.
Outflow
To flow out.
Outleap
To surpass in leaping.
Outrage
To rage in excess of.
Outrunner
An offshoot; a branch.
Outstep
To exceed in stepping.
Outtaken
Excepted; save.
Outtoil
To exceed in toiling.
Outwalk
To excel in walking; to leave behind in walking.
Overdevelop
To develop excessively;
Overflowing
An overflow; that which overflows; exuberance; copiousness.
Overliness
The quality or state of being overly; carelessness.
Overmellow
Too mellow; overripe.
Oversell
To sell for a higher price than; to exceed in selling price.
Overweight
Overweighing; excessive.
Overworn
Worn out or subdued by toil; worn out so as to be trite.
Oviparity
Generation by means of ova. See .
ozone
A colorless gaseous substance () obtained (as by the silent discharge of electricity in oxygen) as an allotropic form of oxygen, containing three atoms in the molecule. It is a strong oxidizer, and probably exists in the air, though by the ordinary tests it is liable to be confused with certain other substances, as hydrogen dioxide, or certain oxides of nitrogen. It derives its name from its peculiar odor, which resembles that of weak chlorine.