13-letter words containing c, r, o, i
- arachniphobia — Alternative form of arachnophobia.
- arachnivorous — Spider-eating.
- arachnoiditis — an inflammation of the arachnoid membrane
- arachnophobia — an abnormal fear of spiders
- arachnophobic — an abnormal or pathological fear of spiders.
- araeometrical — relating to araeometry
- arboriculture — the cultivation of trees or shrubs, esp for the production of timber
- arc of lowitz — a halo or arc of light, occurring infrequently, which extends diagonally downward from a 22° parhelion.
- archaelogical — Nonstandard spelling of archaeological.
- archaeologian — (archaic) An archaeologist.
- archaeologist — a specialist in archaeology, the scientific study of prehistoric peoples and their cultures by analysis of their artifacts, inscriptions, monuments, etc.
- archaeometric — relating to archaeometry
- archbishopric — the rank, office, or jurisdiction of an archbishop
- archeological — of or relating to archaeology.
- archeologists — archaeology.
- archidiaconal — of or relating to an archdeacon or his office
- archipelagoes — Plural form of archipelago.
- architectonic — denoting, relating to, or having architectural qualities
- arctic willow — a low-growing shrub, Salix arctica, of the tundra
- arcticologist — a person who specializes in arcticology.
- aridification — the process by which a humid region becomes increasingly dry, as by climatic change or human interference with the ecology.
- aristocracies — Plural form of aristocracy.
- aristocratism — the principles of aristocrats
- aristolochene — (organic compound) A bicyclic sesquiterpene produced by certain fungi.
- arsenous acid — a toxic white powder, As2O3, used to make other arsenic compounds, insecticides, and preservatives; white arsenic
- arthroconidia — Plural form of arthroconidium.
- arthroscopies — Plural form of arthroscopy.
- articulations — Plural form of articulation.
- arundinaceous — resembling a reed
- aryepiglottic — pertaining to or connecting the arytenoid cartilage and the epiglottis.
- ascorbic acid — Ascorbic acid is another name for vitamin C.
- astrodynamics — the study of the motion of natural and artificial bodies in space
- astronautical — of or relating to astronautics or astronauts.
- astroparticle — (astrophysics) A subatomic particle of cosmic origin.
- astrophysical — Of or pertaining to astrophysics.
- atmospherical — pertaining to, existing in, or consisting of the atmosphere: atmospheric vapors.
- atomic energy — nuclear energy
- atomic number — the number of protons in the nucleus of an atom of an element
- atomic theory — any theory in which matter is regarded as consisting of atoms, esp that proposed by John Dalton postulating that elements are composed of atoms that can combine in definite proportions to form compounds
- atrociousness — The state of being atrocious.
- auctioneering — Present participle of auctioneer.
- audience room — a room for holding formal interviews or hearings.
- audiographics — audiographic teleconferencing
- austroasiatic — a family of languages spoken in SE Asia and the landsaround the Bay of Bengal and consisting principally of Vietnamese, Khmer, Mon, Khasi, Nicobarese, and the Munda languages.
- autapomorphic — (biology) Describing any characteristic that has evolved in only a single species (or other taxon).
- authenticator — a person or thing that authenticates.
- auto-injector — An auto-injector is a hypodermic syringe that you can use to inject yourself with a liquid.
- autocatharsis — a therapeutic process designed to free unconscious disturbances by having the patient write about his or her experiences, impressions, etc.
- autoeroticism — the arousal and use of one's own body as a sexual object, as through masturbation
- autographical — Relating to, or used in, the process of autography.