9-letter words containing o, r, a, i
- aphorized — Simple past tense and past participle of aphorize.
- aphorizer — a person who aphorizes
- aphorizes — Third-person singular simple present indicative form of aphorize.
- aphrodite — the goddess of love and beauty, daughter of Zeus
- apivorous — eating bees
- apodiform — (zoology) Belonging to the order Apodiformes, including swifts and hummingbirds.
- apparitor — an officer who summons witnesses and executes the orders of an ecclesiastical and (formerly) a civil court
- appointer — to name or assign to a position, an office, or the like; designate: to appoint a new treasurer; to appoint a judge to the bench.
- appointor — a person to whom a power to nominate persons to take property is given by deed or will
- apportion — When you apportion something such as blame, you decide how much of it different people deserve or should be given.
- approving — An approving reaction or remark shows support for something, or satisfaction with it.
- apriorism — the philosophical doctrine that there may be genuine knowledge independent of experience
- apriorist — a person who believes in apriorism
- apriority — the quality or fact of being a priori
- apronlike — resembling an apron
- aprosexia — Inability to concentrate.
- aprotinin — (protein) A polypeptide, obtained from bovine lung tissue, that acts as a protease inhibitor, and is used in surgery to reduce bleeding.
- aquaporin — any one of a group of proteins in cell membranes that allow the passage of water across the membrane
- aquarobic — pertaining to exercises performed standing up in a swimming pool
- arabinose — a pentose sugar in plant gums, esp of cedars and pines. It is used as a culture medium in bacteriology. Formula: C5H10O5
- arachnoid — the middle of the three membranes that cover the brain and spinal cord
- aragonite — a generally white or grey mineral, found in sedimentary rocks and as deposits from hot springs. Composition: calcium carbonate. Formula: CaCO3. Crystal structure: orthorhombic
- arational — Not based on or governed by reason.
- arborists — Plural form of arborist.
- arborized — Simple past tense and past participle of arborize.
- arboviral — caused by an arbovirus
- arbovirus — any one of a group of viruses that cause such diseases as encephalitis and dengue and are transmitted to humans by arthropods, esp insects and ticks
- arccosine — the function the value of which for a given argument between –1 and 1 is the angle in radians (between 0 and π), the cosine of which is that argument: the inverse of the cosine function
- archilowe — a treat, such as a drink, given in return for something
- archivolt — a moulding around an arch, sometimes decorated
- archontic — relating to an archon
- arcuation — the use of arches or vaults in buildings
- arecoline — a drug derived from betel nuts and producing a range of effects, including increased salivation, body temperature, and heart rate
- arenation — the use of hot sand as a medical poultice
- argan oil — a yellow nutty-flavoured oil extracted from the ripe green olive-like fruits of the argan tree, Argania spinosa of SW Morocco, and used in cooking, medicines, and cosmetics
- arid zone — either of the zones of latitude 15–30° N and S characterized by very low rainfall and desert or semidesert terrain
- aristotle — a bottle
- arlington — a county of N Virginia: site of Arlington National Cemetery
- armadillo — An armadillo is a small animal whose body is covered with large bony scales and which rolls itself into a ball when it is attacked. Armadillos are mainly found in South and Central America.
- armorican — a native or inhabitant of Armorica
- armouries — a drill hall used for training and as headquarters by a reserve unit of the armed forces
- aromantic — Not given to experiencing romantic attraction to others.
- aromatics — Plural form of aromatic.
- aromatise — Alternative spelling of aromatize.
- aromatize — to make aromatic
- arpeggios — Plural form of arpeggio.
- arrowlike — resembling an arrow
- arsenious — of or containing arsenic in the trivalent state
- arsonists — Plural form of arsonist.
- art union — a lottery, often with prizes other than cash