13-letter words containing n, a, i, p
- open adoption — an arrangement in which contact is maintained or allowed between a child's adoptive and biological parents.
- open diapason — a full, rich outpouring of melodious sound.
- open interval — (mathematics) A type of interval (range of numbers) that does not include either of its endpoints. For example, when mixing red and blue paint, the proportion of red lies in the interval 0% to 100% but can't be exactly 0% or 100% or it wouldn't be a mixture.
- open learning — a system of further education on a flexible part-time basis
- open marriage — a marriage in which the partners agree that each is free to have sexual relationships with other partners.
- open sandwich — a sandwich served on only one slice of bread, without a covering slice.
- operationally — able to function or be used; functional: How soon will the new factory be operational?
- operativeness — (uncountable) The state or quality of being operative.
- opinionatedly — In an opinionated manner.
- opisthobranch — any gastropod mollusk of the order Opisthobranchia, as the sea slugs, sea butterflies, and sea hares, characterized by a vestigial or absent mantle and shell and two pairs of tentacles.
- oppignoration — the act or an instance of pawning or pledging
- oppositionary — the action of opposing, resisting, or combating.
- oprahfication — the perceived increase in people’s desire to discuss their emotions or personal problems, attributed to the influence of confessional television programmes
- optical bench — an apparatus, as a special table or rigid beam, for the precise positioning of light sources, screens, and optical instruments used for optical and photometric studies, having a ruled bar to which these devices can be attached and along which they can be readily adjusted.
- optical crown — an optical glass of low dispersion and relatively low refractive index. It is used in the construction of lenses
- optical flint — an optical glass of high dispersion and high refractive index containing lead oxide. They are used in the manufacture of lenses, artificial gems, and cut glass
- optical sound — sound recorded on and subsequently played back from an optical or photographic soundtrack, as opposed to a magnetic soundtrack.
- optimizations — Plural form of optimization.
- ora pro nobis — a Latin invocation meaning pray for us
- organotropism — Physiology. the attraction of microorganisms or chemical substances to particular organs or tissues of the body.
- ornithophobia — Fear of birds.
- orthopinakoid — a crystalline plane
- outmanipulate — to surpass in manipulation
- outwash plain — Geology. a broad, sloping landform built of coalesced deposits of outwash.
- over-planning — a scheme or method of acting, doing, proceeding, making, etc., developed in advance: battle plans.
- overexpansion — the act or process of expanding.
- overpedalling — the overuse of the piano's pedals
- overpotential — overvoltage.
- ovipositional — pertaining to the laying of eggs through an ovipositor
- pacific ocean — an ocean bordered by the American continents, Asia, and Australia: largest ocean in the world; divided by the equator into the North Pacific and the South Pacific. 70,000,000 sq. mi. (181,300,000 sq. km); greatest known depth, 35,433 feet (10,800 meters).
- packing crate — A packing crate is a large wooden box in which things are put so that they can be stored or taken somewhere.
- packing house — A packing house is a company that processes and packs food, especially meat, to be sold.
- packing plant — an establishment for processing and packing foods, especially meat, to be sold at wholesale.
- paddle tennis — a game combining elements of tennis and handball, played with paddles and a rubber ball on a screened court about half the size of and having a lower net than a tennis court.
- paddling pool — A paddling pool is a shallow artificial pool for children to paddle in.
- paediatrician — A paediatrician is a doctor who specializes in treating sick children.
- painstakingly — taking or characterized by taking pains or trouble; expending or showing diligent care and effort; careful: a painstaking craftsman; painstaking research.
- painted horse — paint (def 6).
- painted snipe — either of two snipelike birds of the family Rostratulidae, of South America and the Old World tropics, the female of which is larger and more brightly colored than the male.
- painted woman — a prostitute; slut.
- painterliness — the quality of being painterly
- pair trawling — the act or practice of using two boats to trawl for fish
- paleomagnetic — Geology. magnetic polarization acquired by the minerals in a rock at the time the rock was deposited or solidified.
- paleosiberian — a group of languages comprising those languages of Siberia that are not affiliated with Indo-European, Altaic, Uralic, or Eskimo-Aleut and including the Chukotian family and the unrelated language isolates Ket, Nivkh, and Yukaghir; Paleo-Asiatic.
- palette knife — a thin blade of varying flexibility set in a handle and used for mixing colors or applying them to a canvas.
- palingenesist — a person who believes in a doctrine of rebirth or transmigration of souls.
- palletization — to place (materials) upon pallets for handling or moving.
- palmification — the fertilization of date palms artificially
- pamlico sound — a sound between the North Carolina mainland and coastal islands.
- pan-germanism — the idea or advocacy of a union of all the German peoples in a single political organization or state.