15-letter words containing a, c
- achievement age — the age at which a child should be able to perform a standardized test successfully
- achilles reflex — ankle jerk.
- achilles tendon — Your Achilles tendon or your Achilles is the tendon inside the back of your leg just above your heel.
- achlorophyllous — containing no chlorophyll.
- achromatic lens — a system of two or more lenses that is substantially free from chromatic aberration and in which the lenses are made of different substances so that the focal length of the system is the same for two or three wavelengths of light.
- achromatophilia — the property of having little or no affinity for stains.
- acid test ratio — a ratio of cash, receivables, and marketable securities to current liabilities, used in determining credit risks.
- acknowledgeable — to admit to be real or true; recognize the existence, truth, or fact of: to acknowledge one's mistakes.
- acknowledgeably — in a way that is able to be generally acknowledged or recognized
- acknowledgement — An acknowledgement is a statement or action which recognizes that something exists or is true.
- acknowledgments — a section of text containing an author’s statement acknowledging his or her use of the works of other authors and thanking the people who have helped him or her, usually printed at the front of a book
- acoustic guitar — an ordinary guitar, which produces its normal sound through the sounding board and is not amplified in any way
- acoustic screen — a fabric-covered, double-sided screen used in open areas such as offices to absorb noise
- acoustical tile — tile made in various sizes and textures from soft, usually fibrous, sound-absorbing material, as wood, cork, or metal, and typically applied to ceilings or walls.
- acousticophobia — Fear of noise.
- acoustoelectric — electroacoustic.
- acquisitiveness — tending or seeking to acquire and own, often greedily; eager to get wealth, possessions, etc.: our acquisitive impulses; acquisitive societies.
- acrimoniousness — The quality of being resentful or cynical.
- acroanaesthesia — (pathology) Loss of sensation in the extremities.
- act of congress — a law that has been passed by both houses of the US Congress and signed by the president; if the president has chosen to veto the bill, it can be passed by a two-thirds majority in Congress
- actinide series — a series of 15 radioactive elements with increasing atomic numbers from actinium to lawrencium
- actinium series — a radioactive decay series that starts with uranium-235 and ends with lead-207
- actinochemistry — the branch of chemistry dealing with actinism; photochemistry.
- actinopterygian — belonging or pertaining to the Actinopterygii, a group of bony fishes.
- action painting — a development of abstract expressionism evolved in the 1940s, characterized by broad vigorous brush strokes and accidental effects of thrown, smeared, dripped, or spattered paint
- action reporter — a news reporter who reports to the public on matters of special interest to the consumer.
- action stations — the positions taken up by individuals in preparation for or during a battle
- active hydrogen — hydrogen in the form of single atoms, rather than molecules, which makes it extremely reactive.
- active immunity — immunity (to a disease) due to the production of antibodies by the body
- activity method — a type of teaching in which students acquire knowledge and understanding by participating in a set of specially designed activities, rather than by passively listening to a teacher
- activity series — a table of metals, listed in the order of their ability to replace other metals while in solution
- actual argument — (programming) A value, expression, or reference passed to a function or subroutine when it is called and which replaces or is bound to the corresponding formal argument. See: argument.
- acute bisectrix — See under bisectrix (def 1).
- acyclic terpene — (originally) any of a class of monocyclic hydrocarbons of the formula C 10 H 16 , obtained from plants.
- adaptive optics — a technique used to increase the resolution of a ground-based astronomical telescope by counteracting the effects of the atmosphere on the image. A deforming mirror in the light path of the telescope maintains a pointlike image of the celestial body using either a real star or a laser beam as a reference
- adenocarcinomas — Plural form of adenocarcinoma.
- adenoidectomies — Plural form of adenoidectomy.
- adhesive factor — the ratio of the force that can be exerted on driving wheels with full traction to the weight on the driving wheels, usually expressed as a percentage.
- adiabatic chart — a graph for the analysis of adiabatic processes.
- adjacent angles — two angles that have the same vertex and a side in common
- adjective group — An adjective group or adjectival group is a group of words based on an adjective, such as 'very nice' or 'interested in football'. An adjective group can also consist simply of an adjective.
- adjectivization — Grammar. to make into an adjective, as by adding a suffix: The noun mirth can be adjectivized by adding -ful or -less to form the adjectives mirthful and mirthless.
- admiralty cloth — melton cloth, used for coats and jackets, especially for the naval service.
- admiralty court — the court that has jurisdiction in matters relating to maritime law
- adoption agency — an agency that matches children needing adoption with people willing to adopt
- adrenalectomies — Plural form of adrenalectomy.
- adrenoreceptors — Plural form of adrenoreceptor.
- adult education — Adult education is education for adults in a variety of subjects, most of which are practical, not academic. Classes are often held in the evenings.
- advance payment — a sum of money paid in advance as a part or the whole of the sum due
- advanced credit — credit toward a degree allowed to a student by a college for courses taken elsewhere or for high scores on preliminary examinations