12-letter words starting with o
- oleoresinous — pertaining to, characteristic of, or containing oleoresin.
- olericulture — the cultivation of vegetables for the home or market.
- olfactometer — a device for estimating the keenness of the sense of smell.
- olfactometry — The study and measurement of smells.
- olfactronics — the measurement and analysis of smells through instruments
- oligarchical — of, relating to, or having the form of an oligarchy.
- oligochaetes — Plural form of oligochaete.
- oligodactyly — The presence of fewer than the usual number of fingers or toes.
- oligopeptide — A peptide whose molecules contain a relatively small number of amino-acid residues.
- oligophagous — (especially of insects) eating only a few types of food.
- oligophrenia — less than normal mental development.
- oligophrenic — less than normal mental development.
- oligopolists — Plural form of oligopolist.
- oligopsonies — Plural form of oligopsony.
- oligospermia — (medicine) Low volume of semen.
- oligotrophic — (of a lake) characterized by a low accumulation of dissolved nutrient salts, supporting but a sparse growth of algae and other organisms, and having a high oxygen content owing to the low organic content.
- olivary body — one of two oval bodies or prominences composed of nerve tissue, one on each side of the anterior surface of the medulla oblongata.
- olive branch — a branch of the olive tree as an emblem of peace.
- olive family — the plant family Oleaceae, characterized by trees and shrubs having opposite, simple or pinnately compound leaves, usually small and sometimes showy flowers, and fruit in the form of a berry, capsule, or winged seed, and including the ash, forsythia, lilac, olive, and privet.
- oliver twist — a novel (1838) by Dickens.
- olla podrida — a spicy Spanish stew of sausage and other meat, chickpeas, and often tomatoes and other vegetables.
- olympic-size — of the dimensions or length prescribed for the Olympic Games and other major athletic competitions: an Olympic-size speed-skating oval.
- olympus mons — the highest of the giant shield volcanoes on Mars, lying 18°N of the equator. Height: 26 km; base diameter: over 600 km
- omar khayyám — Omar, Omar Khayyám.
- ombrophilous — (of plants) tolerant of wet conditions
- ombrophobous — (of plants) not able to tolerate wet conditions
- ombudsperson — ombudsman (def 2).
- omega baryon — a negative baryon having a mass 3272 times that of the electron and a mean lifetime of 8 X 10 -11 seconds.
- omelette pan — a frying pan that is designed for making omelettes in.
- omnibus bill — a bill dealing with, or providing for many different things or cases
- omnidistance — the distance between an omnirange station and a receiver.
- omnipotently — almighty or infinite in power, as God.
- omnipresence — present everywhere at the same time: the omnipresent God.
- omnisciences — Plural form of omniscience.
- omnisciently — having complete or unlimited knowledge, awareness, or understanding; perceiving all things.
- omnishambles — Chiefly British Informal. a situation, especially in politics, in which poor judgment results in disorder or chaos with potentially disastrous consequences.
- omnivorously — eating both animal and plant foods.
- omphalomancy — Divination by means of a child's navel, to learn how many children the mother may have.
- omphaloscopy — Introversion.
- on a bowline — beating close to the wind
- on a tangent — on a completely different or divergent course, esp of thought
- on aggregate — If one team beats another on aggregate, it wins because it has a higher total score than the other team after a series of games.
- on all fours — all four limbs or extremities; the four legs or feet of an animal or both arms and both legs or both hands and both feet of a person: The cat rolled off the ledge but landed on all fours.
- on behalf of — in / on behalf of, as a representative of or a proxy for: On behalf of my colleagues, I address you tonight.
- on one's own — of, relating to, or belonging to oneself or itself (usually used after a possessive to emphasize the idea of ownership, interest, or relation conveyed by the possessive): He spent only his own money.
- on one's pat — alone; on one's own
- on one's tod — on one's own
- on principle — an accepted or professed rule of action or conduct: a person of good moral principles.
- on probation — under the supervision of a probation officer
- on sb's part — If you talk about a feeling or action on someone's part, you are referring to something that they feel or do.