10-letter words containing t, r, o
- apotropaic — preventing or intended to prevent evil
- apotropous — (of a plant ovule) anatrophous with a ventral raphe
- 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.
- 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.
- approbated — Simple past tense and past participle of approbate.
- aprication — the act of sunbathing or basking in the sun
- 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
- 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
- arboretums — Plural form of arboretum.
- arborvitae — any of a number of N. American or Far Eastern evergreen conifers, belonging chiefly to the genus Thuja
- archeocyte — (in sponges) a type of amoebocyte capable of developing into other types of cells, especially reproductive cells.
- archivolts — Plural form of archivolt.
- archontate — an archon's period in office
- arctic fox — a fox, Alopex lagopus, of arctic regions, whose fur is dark grey in the summer and white in the winter
- arctogaean — of or relating to Arctogaea
- arctophile — a person who collects teddy bears or is fond of them
- arctophily — the practice of collecting teddy bears
- arefaction — the act of drying, or a dried condition
- areopagite — a member of the Areopagus, a judicial council of ancient Athens that met on the hill of that name
- argenteous — silvery.
- argyrodite — a rare mineral, Ag8GeS6, that contains silver, germanium, and sulphur
- 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.
- armipotent — strong in arms or war
- aromatical — (rare) aromatic.
- aromatized — Simple past tense and past participle of aromatize.
- arrenotoky — parthenogenesis in which only males are produced.
- arricciato — arriccio.
- arrogantly — making claims or pretensions to superior importance or rights; overbearingly assuming; insolently proud: an arrogant public official.
- arrogating — Present participle of arrogate.
- arrogation — to claim unwarrantably or presumptuously; assume or appropriate to oneself without right: to arrogate the right to make decisions.
- arrogative — Making undue claims and pretensions; prone to arrogance.
- 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
- arteriolar — relating to arterioles or minuscule arteries
- arterioles — Plural form of arteriole.
- arthrodial — a joint, as in the carpal articulations, in which the surfaces glide over each other in movement.