10-letter words containing o, s
- apposition — If two noun groups referring to the same person or thing are in apposition, one is placed immediately after the other, with no conjunction joining them, as in 'Her father, Nigel, left home three months ago.'
- appositive — standing in apposition
- approaches — Plural form of approach.
- apropos of — with regard to; in respect of
- aquafortis — concentrated nitric acid, used for etching
- aquaponics — a farming system that circulates wastewater from animal aquaculture to hydroponically cultivated plants, whereby the plants draw nutrients from the waste and filter the water, allowing for its recycled use by the aquatic animals.
- aquaporins — Plural form of aquaporin.
- aquiferous — conveying, containing or yielding water
- arachnoids — Plural form of arachnoid.
- araeostyle — having an intercolumniation of four diameters.
- arboresque — a tree.
- arboretums — Plural form of arboretum.
- 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).
- 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.
- archemorus — Opheltes.
- archespore — the cell or group of cells in a sporangium that gives rise to spores
- archivolts — Plural form of archivolt.
- 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.
- arcosolium — (in Roman catacombs) an arched recess for a sarcophagus.
- areligious — unconcerned with or indifferent to religious matters.
- arenaceous — (of sedimentary rocks and deposits) composed of sand or sandstone
- argenteous — silvery.
- ariovistus — flourished c71–58 b.c, Germanic leader of the Suevi.
- aristocrat — An aristocrat is someone whose family has a high social rank, especially someone who has a title.
- aristology — the art of eating
- aristotype — a process of photographic printing in which paper coated with silver chloride in gelatin is used.
- armadillos — Plural form of armadillo.
- armigerous — of, having, or entitled to have a coat of arms
- armourless — having no armour
- army corps — a military formation that comprises two or more divisions and additional support arms
- arrowgrass — either of two species, sea arrowgrass (Triglochin maritima) or marsh arrowgrass (T. palustris), of monocotyledonous perennials having long thin fleshy leaves and spikes of inconspicuous flowers
- arrowheads — Plural form of arrowhead.
- arrowsmith — a novel (1925) by Sinclair Lewis.
- arse about — to play the fool; act stupidly, esp in an irritating manner
- arsenolite — a mineral, arsenic trioxide, As 2 O 3 , occurring usually as a white incrustation on arsenical ores.
- art school — tertiary level college for students of art
- arterioles — Plural form of arteriole.
- arthropods — any invertebrate of the phylum Arthropoda, having a segmented body, jointed limbs, and usually a chitinous shell that undergoes moltings, including the insects, spiders and other arachnids, crustaceans, and myriapods.
- artichokes — Plural form of artichoke.
- artocarpus — a genus of the mulberry family, originating in Asia, species of which include the jackfruit and the breadfruit
- arytenoids — Plural form of arytenoid.
- as a whole — If you refer to something as a whole, you are referring to it generally and as a single unit.
- as follows — You use as follows in writing or speech to introduce something such as a list, description, or explanation.
- as good as — 'As good as' can be used to mean 'almost.'
- as long as — If you say that something is the case as long as or so long as something else is the case, you mean that it is only the case if the second thing is the case.
- as one man — with unanimous action or response
- as soon as — If you say that something happens as soon as something else happens, you mean that it happens immediately after the other thing.
- as soon…as — used to indicate that the second alternative mentioned is not preferable to the first