11-letter words starting with o
- opera cloak — a large cloak worn over evening clothes
- opera house — a theater devoted chiefly to operas.
- opera seria — Italian dramatic opera of the 18th century based typically on a classical subject and characterized by extensive use of the aria da capo and recitative.
- opera-lover — someone who likes opera very much
- operability — that can be treated by a surgical operation. Compare inoperable (def 2).
- operational — able to function or be used; functional: How soon will the new factory be operational?
- operatively — a person engaged, employed, or skilled in some branch of work, especially productive or industrial work; worker.
- operativity — a person engaged, employed, or skilled in some branch of work, especially productive or industrial work; worker.
- operatories — a room or other area with special equipment and facilities, as for dental surgery, scientific experiments, or the like.
- operculated — relating to the operculum
- operoseness — (archaic) The state of being operose; tedium.
- ophicalcite — a type of marble containing serpentine and calcite
- ophicleides — Plural form of ophicleide.
- ophidiarium — an enclosure for snakes, adapted to their normal living conditions
- ophiologist — the branch of herpetology dealing with snakes.
- ophiophobia — A morbid fear of snakes.
- ophthalmist — an eye expert; an oculist
- ophthalmol. — ophthalmology
- opinionated — obstinate or conceited with regard to the merit of one's own opinions; conceitedly dogmatic.
- opinionates — Third-person singular simple present indicative form of opinionate.
- opinionator — (obsolete) An opinionated person; one given to conjecture.
- opinionized — Simple past tense and past participle of opinionize.
- opisthokont — (biology) Any of very many eukaryotes whose flagellate cells propel themselves with a single posterior flagellum.
- opisthosoma — the abdomen of a spider or other arachnid
- opium poppy — a Eurasian poppy, Papaver somniferum, having white, pink, red, or purple flowers, cultivated as the source of opium, for its oily seeds, and as an ornamental.
- oppenheimer — J(ulius) Robert, 1904–67, U.S. nuclear physicist.
- oppertunity — Misspelling of opportunity.
- oppignorate — to promise or give as security
- opportunely — appropriate, favorable, or suitable: an opportune phrase for the occasion.
- opportunism — the policy or practice, as in politics, business, or one's personal affairs, of adapting actions, decisions, etc., to expediency or effectiveness regardless of the sacrifice of ethical principles.
- opportunist — a person who practices opportunism, or the policy of adapting actions, decisions, etc., to effectiveness regardless of the sacrifice of ethical principles: He is an extreme opportunist and always thinks the ends justify the means.
- opportunity — an appropriate or favorable time or occasion: Their meeting afforded an opportunity to exchange views.
- oppositions — the action of opposing, resisting, or combating.
- oppressions — Plural form of oppression.
- opprobrious — conveying or expressing opprobrium, as language or a speaker: opprobrious invectives.
- oppugnation — Opposition.
- oppurtunity — Misspelling of opportunity.
- opthamology — Misspelling of ophthalmology.
- optic nerve — either one of the second pair of cranial nerves, consisting of sensory fibers that conduct impulses from the retina to the brain.
- optical art — op art.
- optimizable — Capable of being optimized.
- optionality — left to one's choice; not required or mandatory: Formal dress is optional.
- optocoupler — An optoisolator.
- optokinetic — relating to a reflex whereby the eye follows a moving object
- optometrist — a licensed professional who practices optometry.
- or anything — You can add or anything to the end of a clause or sentence in order to refer vaguely to other things that are or may be similar to what has just been mentioned.
- or whatever — You say or whatever to refer generally to something else of the same kind as the thing or things that you have just mentioned.
- or wherever — You use or wherever to say that something might happen in a place other than the place you have mentioned, but that you are not able to say exactly where.
- oracle card — (tool) A Hypercard-like product from Oracle for constructing database applications. It runs on IBM PC and Macintosh.
- oracle*case — A set of CASE tools from Oracle.