Select a letter for some words
OAS
The an international association of countries in the Western hemisphere. It was created in 1948 to promote military and economic and social and cultural cooperation.
Obdiplostemonous
Having twice as many stamens as petals, those of the outer set being opposite the petals; -- said of flowers.
Obeseness
Quality of being obese; obesity.
Objurgation
The act of objurgating; reproof.
Obolize
See .
Obrogate
To annul indirectly by enacting a new and contrary law, instead of by expressly abrogating or repealing the old one.
Obstetrication
The act of assisting as a midwife; delivery.
Obtusely
In an obtuse manner.
Obumbrate
To shade; to darken; to cloud.
Occident
The part of the horizon where the sun last appears in the evening; that part of the earth towards the sunset; the west; -- opposed to . Specifically, in former times, Europe as opposed to Asia; now, also, the Western hemisphere.
Occipitoaxial
Of or pertaining to the occipital bone and second vertebra, or axis.
Oceloid
Resembling the ocelot.
Octyl
A hypothetical hydrocarbon radical regarded as an essential residue of octane, and as entering into its derivatives; .
nanthyl
A hydrocarbon radical formerly supposed to exist in nanthic acid, now known to be identical with heptyl.
off-day
A day when things go poorly; .
Offensible
That may give offense.
Offensive
The state or posture of one who offends or makes attack; aggressive attitude; the act of the attacking party; -- opposed to .
off-the-rack
Intended to be worn without alterations; ready-to-wear; -- of clothing. Contrasted with , .
Ohm
The standard unit in the measure of electrical resistance, being the resistance of a circuit in which a potential difference of one volt produces a current of one ampre. As defined by the International Electrical Congress in 1893, and by United States Statute, it is a resistance substantially equal to 10 units of resistance of the C. G. S. system of electro-magnetic units, and is represented by the resistance offered to an unvarying electric current by a column of mercury at the temperature of melting ice 14.4521 grams in mass, of a constant cross-sectional area, and of the length of 106.3 centimeters. As thus defined it is called the .
Oiler
One who deals in oils.
oilstove
A stove that burns oil (such as kerosine) for heating or cooking.
ojo
A spring, surrounded by rushes or rank grass; an oasis.
Okra
An annual plant ( syn. ), whose green pods, abounding in nutritious mucilage, are much used for soups, stews, or pickles; gumbo.
Oleandra
A genus of tropical epiphytic or terrestrial ferns; also classed as the family .
Ology
A colloquial or humorous name for any science or branch of knowledge.
Omegoid
Having the form of the Greek capital letter Omega (Omega;).
Omnipercipient
Perceiving everything.
On
Forward, in progression; onward; -- usually with a verb of motion;
on-site
Taking place or located at the indicated site; . Opposed to .
onychophoran
Any of numerous velvety-skinned wormlike carnivorous animals common in tropical forests having characteristics of both arthropods and annelid worms; a member of the , also called . See .
oozing
leaking out slowly.
operationalist
Of or pertaining to operationalism.
Operatively
In an operative manner.
Oppletion
The act of filling up, or the state of being filled up; fullness.
optimum
Best possible or most desirable; -- usually under a restriction expressed or implied; .
Ord
An edge or point; also, a beginning.
Orderly
Conformed to order; in order; regular; .
Oreortyx
A genus of birds including the mountain quail of the western U. S.
Organicalness
The quality or state of being organic.
Organoleptic
Making an impression upon an organ; plastic; -- said of the effect or impression produced by any substance on the organs of touch, taste, or smell, and also on the organism as a whole.
Orichalch
A metallic substance, resembling gold in color, but inferior in value; a mixed metal of the ancients, resembling brass; -- called also , , etc.
Orientalize
to render Oriental; to cause to conform to Oriental manners or conditions.
Orisont
Horizon.
Orpheline
An orphan.
Orthognathism
The quality or state of being orthognathous.
Orthoptera
An order of mandibulate insects including grasshoppers, locusts, cockroaches, mantids, crickets, katydids, etc. See under .
Orthospermous
Having the seeds straight, as in the fruits of some umbelliferous plants; -- opposed to .
Oscinine
Of or pertaining to the Oscines.
Osnaburg
A species of coarse linen, originally made in , Germany.
Ostentation
The act of ostentating or of making an ambitious display; unnecessary show; pretentious parade; -- usually in a detractive sense.
Osteosclerosis
Abnormal hardness and density of bone.
Otaheite apple
The fruit of a Polynesian anacardiaceous tree (), also called . It is rather larger than an apple, and the rind has a flavor of turpentine, but the flesh is said to taste like pineapples.
Outbring
To bring or bear out.
Outfield
Arable land which has been or is being exhausted. See , 1.
Outpost
A post or station without the limits of a camp, or at a distance from the main body of an army, for observation of the enemy.
outrange
to have a greater range than; -- of guns or missiles.
Outrecuidance
Excessive presumption.
outrigger
Any spar or projecting timber run out for temporary use, as from a ship's mast, to hold a rope or a sail extended, or from a building, to support hoisting teckle.
Outstorm
To exceed in storming.
Outtravel
To exceed in speed or distance traveled.
Outwork
A minor defense constructed beyond the main body of a work, as a ravelin, lunette, hornwork, etc.
Overcanopy
To cover as with a canopy.
overclothes
clothing for use outdoors.
Overcunning
Exceedingly or excessively cunning.
Overgross
Too gross.
Overissue
An excessive issue; an issue, as of notes or bonds, exceeding the limit of capital, credit, or authority.
Overlarge
Too large; too great.
Overmultitude
To outnumber.
Overpassionate
Passionate to excess.
Overrule
To rule over; to govern or determine by superior authority.
Overstore
To overstock.
Overtedious
Too tedious.
Overtrow
To be too trustful or confident; to trust too much.
overvaliant
Having or showing undue valor or boldness; .
Oviposit
To deposit or lay (an egg).
Oxhide
The skin of an ox, or leather made from it.
Oxidable
Capable of being converted into an oxide.
Oxonian
A student or graduate of , in England.
Oxybenzene
Hydroxy benzene. Same as .
Oxycalcium
Of or pertaining to oxygen and calcium; . See .
Oxyphenic
Pertaining to, or designating, the phenol formerly called , and now and . See .