11-letter words containing o, r, t, h
- apostrophes — Plural form of apostrophe.
- apostrophic — a digression in the form of an address to someone not present, or to a personified object or idea, as “O Death, where is thy sting?”.
- apostrophus — a symbol resembling a reversed letter C used in Roman numerals to denote large numbers
- approacheth — Archaic third-person singular form of approach.
- archaeocyte — (in sponges) a type of amoebocyte capable of developing into other types of cells, especially reproductive cells.
- archenteron — the cavity within an embryo at the gastrula stage of development that eventually becomes the digestive cavity
- archeometry — the branch of archaeology that deals with the dating of archaeological specimens through specific techniques, as radiocarbon dating and amino-acid dating.
- archicortex — (anatomy) Part of the allocortex, specifically three layered hippocampal cortexes necessary for hippocampus formation.
- architector — (obsolete) An architect.
- archtraitor — A chief or transcendent traitor.
- arctophilia — the practice of collecting teddy bears
- aroint thee — away! begone!
- arrhenotoky — a form of parthenogenesis which produces only male offspring
- art history — study of art through the ages
- arthrectomy — surgical excision of a joint
- arthrodesis — the fusion of bones in a joint through surgery which causes immobility of the joint
- arthrograms — Plural form of arthrogram.
- arthropathy — a disease of a joint
- arthropodan — relating to arthropods
- arthroscope — a tubular instrument that is inserted into the capsule of a joint to examine the joint, extract tissue, etc
- arthroscopy — the use of an arthroscope to diagnose an injury to or disease of a joint or to perform minor surgery on a joint.
- arthrospore — a sporelike cell of ascomycetous fungi and some algae produced by a breaking of the hyphae
- arthur monk — (James) Arthur ("Art") born 1957, U.S. football player.
- artophorion — pyx (def 1a).
- asphyxiator — to produce asphyxia in.
- astraphobia — a fear of thunder and lightning
- astrography — The art of describing or delineating the stars; a description or mapping of the heavens.
- astrophobia — A fear of stars and celestial space.
- astrophyton — The giant basket star, an early Mesozoic invertebrate.
- astrosphere — the part of the aster excluding the centrosome
- atherectomy — the removal of plaque from an artery by means of a tiny rotating cutting blade inserted through a catheter.
- athermanous — capable of stopping radiant heat or infrared radiation
- atherogenic — causing atheroma
- atmosphered — having an intellectual or psychological climate or feeling
- atmospheres — Plural form of atmosphere.
- atmospheric — Atmospheric is used to describe something which relates to the Earth's atmosphere.
- auditorship — the position or function of auditor
- authorcraft — the skilled ability of an author
- authorising — Present participle of authorise.
- authorities — the power to determine, adjudicate, or otherwise settle issues or disputes; jurisdiction; the right to control, command, or determine.
- authorizing — Present participle of authorize.
- autochanger — a device in a record player or CD player that enables a small stack of records or CDs to be dropped automatically onto the turntable or player tray one at a time and played separately
- autographed — Simple past tense and past participle of autograph.
- autographic — of, for, or like an autograph or autographs
- automorphic — shaped and designed after oneself
- autotrophic — (of organisms such as green plants) capable of manufacturing complex organic nutritive compounds from simple inorganic sources such as carbon dioxide, water, and nitrates, using energy from the sun
- auxotrophic — designating or of a mutant organism requiring more nutritional substances than its prototrophic parent because it has lost the ability to make a certain enzyme
- axerophthol — any form of vitamin A
- baby-mother — a young mother who has been abandoned by the baby's father just before or after the birth
- band theory — a theory of the electrical properties of metals, semiconductors, and insulators based on energy bands