13-letter words containing o, r, l, a
- anthropolatry — the worship of a human as a god
- anthropologic — the science that deals with the origins, physical and cultural development, biological characteristics, and social customs and beliefs of humankind.
- anthrozoology — The study of the interactions between humans and animals.
- anti-morality — conformity to the rules of right conduct; moral or virtuous conduct.
- anti-rational — agreeable to reason; reasonable; sensible: a rational plan for economic development.
- anti-roll bar — a crosswise rubber-mounted bar in the suspension of a motor vehicle, which counteracts the movement downward on one side when cornering
- antibillboard — indicating an opposition to the erection of billboards
- anticlinorium — a vast elongated anticline with its strata further folded into anticlines and synclines
- antielectrons — Plural form of antielectron.
- antiformalist — opposed to formalism
- antilogarithm — a number whose logarithm to a given base is a given number
- antimicrobial — capable of destroying or inhibiting the growth of disease-causing microbes
- antipersonnel — (of weapons, etc) designed to cause casualties to personnel rather than to destroy equipment or defences
- antiprotozoal — (medicine) That inhibits or destroys protozoa.
- antireligious — opposed to religious ideas, beliefs, and organizations
- aperiodically — In an aperiodic way.
- apheliotropic — growing in a direction away from the sunlight
- aphrodisiacal — having an aphrodisiac quality
- apicoalveolar — articulated with the tip of the tongue in contact with or in approximation to the alveolar ridge.
- apocryphalist — A member of the group who supported the inclusion of the Apocrypha in the Bible.
- apoplectiform — of or resembling apoplexy or stroke.
- appeals court — An appeals court is the same as an appellate court.
- apple of peru — a plant, Nicandra physalodes, of the nightshade family, having large blue flowers.
- apple orchard — an orchard planted with apple trees
- apple-knocker — Northern U.S. a rustic.
- apportionable — to distribute or allocate proportionally; divide and assign according to some rule of proportional distribution: to apportion expenses among the three men.
- appropriately — suitable or fitting for a particular purpose, person, occasion, etc.: an appropriate example; an appropriate dress.
- approval code — An approval code is a PIN or other verification code needed to authorize a payment going through the cash register.
- approximately — close to; around; roughly or in the region of
- april showers — showers falling in April, generally considered a showery month
- araeometrical — relating to araeometry
- arbitrational — relating to, involving, or resulting from arbitration
- 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.
- archaezoology — the analysis and interpretation of animal remains found at archaeological sites
- archeological — of or relating to archaeology.
- archeologists — archaeology.
- archeptolemus — (in the Iliad) the son of Iphitus who served as a charioteer for Hector.
- archidiaconal — of or relating to an archdeacon or his office
- archipelagoes — Plural form of archipelago.
- arctic willow — a low-growing shrub, Salix arctica, of the tundra
- arcticologist — a person who specializes in arcticology.
- argilliferous — containing or yielding clay
- aristolochene — (organic compound) A bicyclic sesquiterpene produced by certain fungi.
- armor-plating — The armor-plating on a vehicle or building is the hard metal covering that is intended to protect it from gunfire and other missiles.
- armored cable — an electric cable having a metal protective covering
- armored scale — any of a family (Diaspididae) of scale insects characterized by a hard, waxy secretion that covers the body: many armored scales are serious pests of trees and shrubs