(economics) a market in which control over the supply of a commodity is in the hands of a small number of producers and each one can influence prices and affect competitors
opportunity
Noun
a possibility due to a favorable combination of circumstances
opulence
Noun
wealth as evidenced by sumptuous living
old money
Noun
the inherited wealth of established upper-class families
ophidism
Noun
poisoning by snake venom
occupational hazard
Noun
any condition of a job that can result in illness or injury
orphanhood
Noun
the condition of being a child without living parents
oligospermia
Noun
insufficient spermatozoa in the semen
octanedioic acid
Noun
a dicarboxylic acid found in cork
ornithine
Noun
an amino acid that does not occur in proteins but is important in the formation of urea
orthophosphorous acid
Noun
a clear or yellow monobasic acid (H3PO2)
osmium
Noun
a hard brittle blue-grey or blue-black metallic element that is one of the platinum metals
oxygen
Noun
a nonmetallic bivalent element that is normally a colorless odorless tasteless nonflammable diatomic gas
olivine
Noun
a mineral consisting of magnesium iron silicate
olivenite
Noun
rare green to black mineral consisting of hydrated copper arsenate that is found in copper deposits
ozonide
Noun
any of a class of unstable chemical compounds resulting from the addition of ozone to a double bond in an unsaturated compound
ozokerite
Noun
a waxy mineral that is a mixture of hydrocarbons and occurs in association with petroleum
ozocerite
Noun
a waxy mineral that is a mixture of hydrocarbons and occurs in association with petroleum
oriental alabaster
Noun
a hard compact kind of calcite
onyx marble
Noun
a hard compact kind of calcite
opal
Noun
a translucent mineral consisting of hydrated silica of variable color
oroide
Noun
alloy of copper and tin and zinc
oreide
Noun
alloy of copper and tin and zinc
orpiment
Noun
a yellow mineral occurring in conjunction with realgar
osmiridium
Noun
a hard and corrosion resistant mineral that is a natural alloy of osmium and iridium (usually containing small amounts of rhodium and platinum)
opsin
Noun
retinal protein formed by the action of light on rhodopsin
olefine
Noun
any unsaturated aliphatic hydrocarbon
olefin
Noun
any unsaturated aliphatic hydrocarbon
organic compound
Noun
any compound of carbon and another element or a radical
osseous tissue
Noun
the porous calcified substance from which bones are made
ooze leather
Noun
a very soft leather made from the skins of calves and having a suede finish on the flesh side
oestrogen
Noun
a general term for female steroid sex hormones that are secreted by the ovary and responsible for typical female sexual characteristics
oestradiol
Noun
the most powerful female hormone that occurs naturally
oestriol
Noun
a naturally occurring estrogenic hormone
oestrone
Noun
a naturally occurring weak estrogenic hormone secreted by the mammalian ovary
omega-3 fatty acid
Noun
a polyunsaturated fatty acid whose carbon chain has its first double valence bond three carbons from the beginning
omega-3
Noun
a polyunsaturated fatty acid whose carbon chain has its first double valence bond three carbons from the beginning
omega-6 fatty acid
Noun
a polyunsaturated fatty acid whose carbon chain has its first double valence bond six carbons from the beginning
omega-6
Noun
a polyunsaturated fatty acid whose carbon chain has its first double valence bond six carbons from the beginning
omeprazole
Noun
antacid (trade name Prilosec) that suppresses acid secretion in the stomach
oxidant
Noun
a substance that oxidizes another substance
oxidizer
Noun
a substance that oxidizes another substance
oxidiser
Noun
a substance that oxidizes another substance
oxidizing agent
Noun
a substance that oxidizes another substance
orthoboric acid
Noun
a white or colorless slightly acid solid that is soluble in water and ethanol
oxybenzene
Noun
a toxic white soluble crystalline acidic derivative of benzene