15-letter words starting with o
- obedience trial — a competitive event at which a dog can progress toward a degree in obedience by demonstrating its ability to follow a prescribed series of commands.
- obituary column — the division of a publication reserved for obituaries
- object database — a database format in which information is shown in the form of objects
- object distance — the distance between the lens of a camera and an object being photographed.
- object exchange — (protocol) (OBEX) A Bluetooth protocol in the Core Protocol Stack for data exchange.
- object language — the language to which a metalanguage refers.
- object-oriented — pertaining to or denoting a system, programming language, etc., that supports the use of objects, as an entire image, a routine, or a data structure.
- objectification — to present as an object, especially of sight, touch, or other physical sense; make objective; externalize.
- objectionable-c — (abuse, humour, language) A hackish take on "Objective C". Objectionable-C uses a Smalltalk-like syntax, but lacks the flexibility of Smalltalk method calls, and (like many such efforts) comes frustratingly close to attaining the Right Thing without actually doing so.
- objective prism — a large prism placed in front of the objective lens or mirror of a telescope, allowing the simultaneous acquisition of the spectra of many stars.
- oblique sailing — the navigation of a vessel on a point of the compass other than one of the cardinal points.
- oblique section — a representation of an object as it would appear if cut by a plane that is other than parallel or perpendicular to its longest axis.
- observation car — a railroad passenger car having a lounge or platform from which the scenery can be viewed.
- observationally — of, relating to, or founded on observation, especially founded on observation rather than experiment.
- obsidian dating — a method of dating obsidian artifacts or debitage by calculating how long it has taken to produce a given thickness of a hydration layer within such matter.
- obsidional coin — siege piece.
- obstacle course — a military training area having obstacles, as hurdles, ditches, and walls, that must be surmounted or crossed in succession.
- obstructionists — Plural form of obstructionist.
- obstructiveness — The characteristic of being obstructive.
- obtuse triangle — a triangle with one obtuse angle.
- occipitomastoid — (anatomy) Relating to, or connecting the occipital and mastoid bones.
- occulting light — a beacon having a light covered briefly at regular intervals.
- ocean greyhound — a fast ship, esp a liner
- ocean of storms — the largest of the dark plains (maria) on the surface of the moon, situated in the second and third quadrant
- ochlocratically — In an ochlocratic way.
- octanitrocubane — (organic compound) A high explosive derived from cubane.
- odd permutation — a permutation of a set of n elements, x 1 , x 2 , …, xn, which permutes the product of all differences of the form (xi – xj), where i is less than j, into the negative of the product.
- odontorhynchous — (of birds) having toothlike ridges inside the beak
- odontostomatous — having jaws that resemble teeth
- odoriferousness — The quality of being odoriferous.
- oedipus complex — the unresolved desire of a child for sexual gratification through the parent of the opposite sex, especially the desire of a son for his mother. This involves, first, identification with and, later, hatred for the parent of the same sex, who is considered by the child as a rival.
- of mice and men — a novel (1937) and play (1938) by John Steinbeck.
- of one's choice — The thing or person of your choice is the one that you choose.
- of sorts/a sort — If you describe something as a thing of sorts or as a thing of a sort, you are suggesting that the thing is of a rather poor quality or standard.
- of the order of — having an approximately specified size or quantity
- off one's chump — insane; crazy
- off one's guard — to keep safe from harm or danger; protect; watch over: to guard the ruler.
- off one's hands — for which one is no longer responsible
- off the trolley — Describes the behaviour of a program that malfunctions and goes catatonic, but doesn't actually crash or abort. See glitch, bug, deep space.
- office building — building containing offices
- office politics — power play in the workplace
- officer of arms — an officer with the duties of a herald, especially one charged with the devising, granting, or confirming of armorial bearings.
- official family — the executives or officials chiefly responsible for the operation of an organization or government.
- official strike — a collective stoppage of work by part or all of the workforce of an organization with the approval of the trade union concerned. The stoppage may be accompanied by the payment of strike pay by the trade union concerned
- offset printing — offset (def 6).
- oil of lavender — an essential oil distilled from lavender flowers, especially Lavandula angustifolia and L. stoechas, and used in perfumery.
- oil of the sick — holy oil used in the sacrament of extreme unction.
- oil tanker pier — An oil tanker pier is a structure over water where oil tankers can stop and load or unload.
- oil-based paint — any paint made with a drying oil or solvent such as linseed
- okhotsk current — a cold ocean current flowing SW from the Bering Sea, E of the Kurile Islands, along the E coast of Japan where it meets the Japan Current.
On this page, we collect all 15-letter words starting with letter O. It’s easy to find right word with a certain length. It is the easiest way to find 15-letter word that beginning with O to use in Scrabble or Crossword puzzles.