15-letter words containing d, a, l, r
- 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.
- oil of lavender — an essential oil distilled from lavender flowers, especially Lavandula angustifolia and L. stoechas, and used in perfumery.
- olbers' paradox — the paradox that if the universe consisted of an infinite number of stars equally distributed through space, then every line of sight would come from a star and the night sky would glow uniformly, which is observationally not true.
- old father time — time personified
- old high german — High German before 1100. Abbreviation: OHG.
- old man's beard — fringe tree.
- old-man's-beard — fringe tree.
- oldenbarneveldt — Johan van. 1547–1619, Dutch statesman, regarded as a founder of Dutch independence; the leading figure (from 1586) in the United Provinces of the Netherlands: executed by Maurice of Nassau
- 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 milkweed — butterfly weed (def 1).
- order of battle — the organization or hierarchy of military forces in preparation for a battle.
- 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).
- organized labor — all workers who are organized in labor unions.
- ornithodelphian — of or relating to mammals of the class Ornithodelphia
- orthodontically — from an orthodontic point of view
- orthopaedically — in an orthopaedic manner
- 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.
- outward-looking — looking beyond oneself; open-minded and reaching out to other people, organizations, etc
- 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
- overhead locker — a locker situated above someone's seat for storing luggage, etc
- 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.
- 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.
- pamprodactylous — having all four toes directed forward, as in swifts and colies.
- paracel islands — a group of uninhabited islets and reefs in the N South China Sea, the subject of territorial claims by China and Vietnam
- paracetaldehyde — paraldehyde.
- paradise flower — a prickly vine, Solanum wendlandii, of the nightshade family, native to Costa Rica, having branched clusters of showy lilac-blue flowers.
- paradise valley — a town in SW Arizona.
- parallel-veined — having closely spaced longitudinal veins, as the leaves of most monocotyledonous plants.
- parallelopipeda — plural of parallelopipedon
- part and parcel — a portion or division of a whole that is separate or distinct; piece, fragment, fraction, or section; constituent: the rear part of the house; to glue the two parts together.
- partial denture — an artificial replacement of one or several of the teeth (partial denture) or all of the teeth (full denture) of either or both jaws; dental prosthesis.
- partial product — the result obtained when a number is multiplied by one digit of a multiplier
- passport holder — a person who has a passport
- pastel-coloured — pale-coloured; in a shade such as pink or pale blue
- pectoral girdle — (in vertebrates) a bony or cartilaginous arch supporting the forelimbs.
- pedestrian mall — A pedestrian mall is the same as a pedestrian precinct.
- pelargonic acid — a colorless, oily, water-immiscible liquid, C 9 H 1 8 O 2 , occurring as an ester in a volatile oil in species of pelargonium: used chiefly in organic synthesis and in the manufacture of lacquers and plastics.
- penal servitude — imprisonment together with hard labor.
- pepper-and-salt — composed of a fine mixture of black with white: pepper-and-salt hair.
- perchloric acid — a colorless, syrupy hygroscopic liquid, HClO 4 , an acid of chlorine containing one more oxygen atom than chloric acid: used chiefly as a reagent in analytical chemistry.
- perpendicularly — vertical; straight up and down; upright.