12-letter words containing a, p, r, i, o
- coulrophobia — an abnormal fear of clowns.
- craniography — examination of the skull as depicted by craniographs, photographs, and charts.
- cranioplasty — Surgical repair of a defect or deformity in the skull.
- criptography — (spelling) It's spelled "cryptography".
- crop failure — a failure of crops to yield sufficient food, etc, to maintain a community or to provide a surplus to sell
- cryptogamian — of or relating to cryptogams
- cryptogamist — a botanist specializing in the study of cryptogams
- cryptomerias — Plural form of cryptomeria.
- cryptomnesia — the reappearance of a suppressed or forgotten memory which is mistaken for a new experience
- cuprammonium — an ion of copper oxide used (in solution) in the manufacture of rayon and other man-made fibres
- curtain pole — a pole from which a curtain is hung in front of a window, door, etc
- cyclographic — of or relating to a cyclograph
- danger point — the point at which something ceases to be safe
- daphnephoria — an ancient Greek festival in honor of Apollo.
- deaspiration — the act of deaspirating
- demographics — data resulting from the science of demography; population statistics
- demographies — the science of vital and social statistics, as of the births, deaths, diseases, marriages, etc., of populations.
- depilatories — Plural form of depilatory.
- deportations — Plural form of deportation.
- depositaries — Plural form of depositary.
- depreciation — the reduction in value of a fixed asset due to use, obsolescence, etc
- depreciatory — tending to depreciate.
- depredations — the act of preying upon or plundering; robbery; ravage.
- deprivations — Plural form of deprivation.
- dermographia — dermatographia.
- dermographic — dermatographia.
- desaparecido — one who has disappeared: used, especially in Latin America, in referring to a person who has been secretly imprisoned or killed during a government's program of political suppression.
- deuteranopia — a form of colour blindness in which there is a tendency to confuse blues and greens, and greens and reds, and in which sensitivity to green is reduced
- diageotropic — (of a plant part) growing at a right angle to the direction of gravity.
- diastrophism — the process of movement and deformation of the earth's crust that gives rise to large-scale features such as continents, ocean basins, and mountains
- dictatorship — Dictatorship is government by a dictator.
- dictyopteran — any insect of the order Dictyoptera, which comprises the cockroaches and mantises
- dinosaur pen — A traditional mainframe computer room complete with raised flooring, special power, its own ultra-heavy-duty air conditioning, and a side order of Halon fire extinguishers. See boa.
- diplocardiac — having the right and left sides of the heart somewhat or completely divided, as in birds and mammals.
- diprionidian — (of a graptolite) with a row of cellules or serrations on both sides
- dipropellant — bipropellant.
- dipyridamole — a yellow crystalline powder, C 24 H 40 N 8 O 4 , used prophylactically for angina pectoris and in combination with other drugs to reduce thrombus formation.
- disapproving — Expressing an unfavorable opinion.
- discographer — a person who compiles discographies.
- discographic — of or relating to a discography
- discorporate — Having no material body.
- disoperation — a relationship between two organisms in a community that is harmful to both
- disopyramide — a substance, C 21 H 29 N 3 O, used in its phosphate form in the symptomatic and prophylactic treatment of certain cardiac arrhythmias.
- dispensatory — a book in which the composition, preparation, and uses of medicinal substances are described; a nonofficial pharmacopoeia.
- dispropriate — to deprive of ownership
- dolphinarium — An aquarium in which dolphins are kept and trained for public entertainment.
- domino paper — a marbleized or figured decorative paper, used for wallpaper, end papers, etc., printed from wood blocks and colored by hand.
- dopaminergic — activated by or sensitive to dopamine.
- drapetomania — (dated) an overwhelming urge to run away (from home, a bad situation, responsibility, etc.).
- drop a brick — a block of clay hardened by drying in the sun or burning in a kiln, and used for building, paving, etc.: traditionally, in the U.S., a rectangle 2.25 × 3.75 × 8 inches (5.7 × 9.5 × 20.3 cm), red, brown, or yellow in color.