15-letter words containing a, d, i, r
- not a dickybird — not a word; nothing
- nuisance ground — a garbage dump.
- 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.
- 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.
- oil of lavender — an essential oil distilled from lavender flowers, especially Lavandula angustifolia and L. stoechas, and used in perfumery.
- old father time — time personified
- old high german — High German before 1100. Abbreviation: OHG.
- oligodendroglia — Oligodendrocytes collectively.
- oligohydramnios — (medicine) A deficit of amniotic fluid in the amniotic sac, causing distinctive deformations of the foetus.
- oligosaccharide — any carbohydrate yielding few monosaccharides on hydrolysis, as two, three, or four.
- omnidirectional — sending or receiving signals in all directions: an omnidirectional microphone.
- operationalised — Simple past tense and past participle of operationalise.
- operationalized — Simple past tense and past participle of operationalize.
- orange chromide — an Asian cichlid fish, Etropus maculatus, with a brownish-orange spotted body
- orange milkweed — butterfly weed (def 1).
- ordinal numbers — Also called ordinal numeral. any of the numbers that express degree, quality, or position in a series, as first, second, and third (distinguished from cardinal number).
- ordinary degree — a university degree without honours
- ordinary income — taxable income, as salary and wages, other than capital gains.
- ordinary rating — a rank in the Royal Navy comparable to that of a private in the army
- ordinary seaman — a seaman insufficiently skilled to be classified as an able-bodied seaman. Abbreviation: O.D., O.S., o.s.
- ordinary shares — British. a share of common stock.
- organic disease — a disease in which there is a structural alteration (opposed to functional disease).
- organized chaos — a complex situation or process that appears chaotic while having enough order to achieve progress or goals
- organized crime — illegal activities co-ordinated by groups
- organized labor — all workers who are organized in labor unions.
- ornithodelphian — of or relating to mammals of the class Ornithodelphia
- orphaned i-node — (operating system) /or'f*nd i:'nohd/ [Unix] 1. A file that retains storage but no longer appears in the directories of a file system.
- orthoboric acid — boric acid (def 1). Compare ortho- (def 2).
- orthodontically — from an orthodontic point of view
- orthopaedic bed — a specially firm bed designed to help correct or ameliorate the discomfort of disorders of the spine and joints
- orthopaedically — in an orthopaedic manner
- outdoorsmanship — a person devoted to outdoor sports and recreational activities, as hiking, hunting, fishing, or camping.
- outline drawing — a drawing consisting only of external lines
- outside caliper — a caliper whose legs turn inward so that it can measure outside dimensions, as the diameter of a rod.
- outside forward — one of two attacking players who usually play on the far side of the field; wing.
- outward-looking — looking beyond oneself; open-minded and reaching out to other people, organizations, etc
- over-advertised — to announce or praise (a product, service, etc.) in some public medium of communication in order to induce people to buy or use it: to advertise a new brand of toothpaste.
- over-cultivated — to prepare and work on (land) in order to raise crops; till.
- overcapitalized — Simple past tense and past participle of overcapitalize.
- overdraft limit — a limit on the amount of money allowed to be withdrawn in excess of the credit balance of a bank or building society account
- overdramatizing — Present participle of overdramatize.
- overentertained — entertained to excess
- overopinionated — too opinionated
- oyster toadfish — See under toadfish (def 1).
- pacific madrone — any of several evergreen trees belonging to the genus Arbutus, of the heath family, especially A. menziesii (Pacific madrone) of western North America, having red, flaky bark and bearing edible reddish berries.
- paedophile ring — a group of people who take part in illegal sexual activity involving children
- paid-in surplus — surplus paid in by purchasers of stock certificates sold at a premium.
- pair production — Physics. the simultaneous creation of a particle and its antiparticle by a nucleus or particle in an excited state, as when a photon is absorbed.
- palindromically — a word, line, verse, number, sentence, etc., reading the same backward as forward, as Madam, I'm Adam or Poor Dan is in a droop.
- panzer division — an armored division of the German army, especially in World War II, consisting chiefly of tanks and organized for making rapid attacks.