10-letter words containing o, a, r
- apparation — (obsolete) A preparation.
- apparition — An apparition is someone you see or think you see but who is not really there as a physical being.
- apple core — the inedible part of an apple which contains the pips
- applicator — An applicator is a device that you use to put something somewhere when you do not want to touch it or do it with your hands.
- appointers — Plural form of appointer.
- appointors — Plural form of appointor.
- apportions — Third-person singular simple present indicative form of apportion.
- approached — to come near or nearer to: The cars slowed down as they approached the intersection.
- approacher — to come near or nearer to: The cars slowed down as they approached the intersection.
- approaches — Plural form of approach.
- approbated — Simple past tense and past participle of approbate.
- approvable — able to be approved
- approvably — in an approvable manner
- approvance — approval
- approvedly — So as to secure approbation; in an approved manner.
- approximal — situated side by side; close together
- aprication — the act of sunbathing or basking in the sun
- april fool — An April Fool is a trick that is played on April Fool's Day.
- apropos of — with regard to; in respect of
- apterygote — belonging or pertaining to the Apterygota, a subclass of primitive wingless insects that undergo little or no metamorphosis.
- aquafortis — concentrated nitric acid, used for etching
- aquaporins — Plural form of aquaporin.
- aquiferous — conveying, containing or yielding water
- arachnoids — Plural form of arachnoid.
- araeometer — a hydrometer
- araeometry — the science of estimating the specific gravity of fluids through the use of an araeometer
- araeostyle — having an intercolumniation of four diameters.
- aragonitic — relating to aragonite
- arbitrator — a person selected to judge a dispute; arbiter, esp. one, as in collective bargaining negotiations, named with the consent of both sides
- arboreally — in trees or by trees
- arboresque — a tree.
- arboretums — Plural form of arboretum.
- arboriform — Resembling a tree in shape or appearance.
- arborvitae — any of a number of N. American or Far Eastern evergreen conifers, belonging chiefly to the genus Thuja
- arc cosine — Trigonometry. the angle, measured in radians, that has a cosine equal to a given number. Symbol: cos −1. Abbreviation: arc cos;
- arc second — Astronomy. second2 (def 4).
- arch board — a distinctive area at the upper part of a stern, curving upward toward the center and giving the name and port of the vessel within a carved and painted frame; escutcheon.
- archbishop — In the Roman Catholic, Orthodox, and Anglican Churches, an archbishop is a bishop of the highest rank, who is in charge of all the bishops and priests in a particular country or region.
- archdeacon — An archdeacon is a high-ranking clergyman who works as an assistant to a bishop, especially in the Anglican church.
- archegonia — the female reproductive organ in ferns, mosses, etc.
- archemorus — Opheltes.
- archeocyte — (in sponges) a type of amoebocyte capable of developing into other types of cells, especially reproductive cells.
- archeology — archaeology
- archeozoic — early Precambrian; Archean
- archespore — the cell or group of cells in a sporangium that gives rise to spores
- archipenko — Aleksandr Porfiryevich (alɪkˈsandr parˈfirjɪvitʃ). 1887– 1964, Russian sculptor and painter, in the US after 1923, whose work is characterized by economy of form
- archivolts — Plural form of archivolt.
- archontate — an archon's period in office
- archoplasm — the protoplasmic material surrounding the centrosome, formerly thought to be involved in the formation of the asters and spindle during mitosis
- archosaurs — Plural form of archosaur.