11-letter words containing a, c, t, o
- acidulation — to make somewhat acid.
- acoelomates — Plural form of acoelomate.
- acoustician — an expert in acoustics
- acquisition — If a company or business person makes an acquisition, they buy another company or part of a company.
- acquisitory — tending or seeking to acquire and own, often greedily; eager to get wealth, possessions, etc.: our acquisitive impulses; acquisitive societies.
- acroamatics — Esoteric lectures.
- acrocentric — (of a chromosome) having the centromere at one end
- acrocorinth — the citadel of ancient Corinth: strategic in the control of the Isthmus of Corinth; extensive ruins.
- acropetally — in an upward direction, towards the apex
- actinodrome — (of a leaf) palmately veined.
- actinograph — a recording actinometer
- actinometer — an instrument for measuring the intensity of radiation, esp of the sun's rays
- actinometry — The measurement of the heating power of electromagnetic radiation, especially that of solar radiation.
- actinomyces — a genus of bacteria that causes disease in humans and improves soil ecology
- actinomycin — any of several toxic antibiotics obtained from bacteria of the genus Streptomyces, used in treating some cancers; the most commonly used is dactinomycin (actinomycin D)
- actinostele — (botany) A type of protostele, in which the core of vascular tissue in the stem extends outward in lobes.
- action film — a film with a fast-moving plot, usually containing scenes of violence
- action hero — the hero in an action film
- action line — a telephone line maintained by a newspaper, television station, or other medium to provide the public a ready means of expressing complaints or obtaining information about matters of vital interest.
- action plan — a statement of the steps that need to be taken to achieve a particular goal or objective
- action shot — a still photograph that shows someone or something in motion
- action verb — a verb, as run, think, or soothe, that expresses something that a person, animal, object, or process in nature can do, as in Close the door! or The storm is flooding many houses along the coast, rather than expressing a state of being. Compare copula (def 2), stative.
- activations — Plural form of activation.
- actor-proof — (of a role or script) effective even if poorly acted.
- actual cost — the cost of a product based on incurred costs of material and labor required in its production.
- acumination — A sharpening; termination in a sharp point; a tapering point.
- adaptogenic — acting to normalize and regulate the systems of the body
- adipocerite — hatchettite.
- adiponectin — (biochemistry) A protein hormone that modulates glucose regulation and fatty acid catabolism.
- adjudicator — a judge, esp in a competition
- adolescents — Plural form of adolescent.
- adscription — ascription
- advice boat — a fast boat for conveying messages; dispatch boat.
- advice note — a document sent by a supplier to a customer to inform him that goods he ordered have been dispatched. It usually gives details such as the quantity of goods and how they have been sent
- aeneolithic — Chalcolithic.
- aeolotropic — anisotropic
- aero-optics — the study of the effect of aircraft-induced and atmospheric disturbances on the efficiency of laser weapons
- aeroculture — a method of growing plants without soil by suspending them above sprays that constantly moisten the roots with water and nutrients.
- aerodonetic — Relating to aerodonetics.
- aeroelastic — capable of changing shape under aerodynamic forces
- aeronautics — Aeronautics is the science of designing and building aeroplanes.
- aerostatics — the study of gases in equilibrium and bodies held in equilibrium in gases
- affectation — If you say that someone's attitude or behaviour is an affectation, you disapprove of the fact that it is not genuine or natural, but is intended to impress other people.
- affectional — relating to or implying affection.
- affectioned — Simple past tense and past participle of affection.
- afflictions — Plural form of affliction.
- afforcement — an increase in force or strength
- affrication — the changing of (a consonantal speech sound) to an affricate
- afroasiatic — designating or of a family of African and Asian languages generally divided into the branches Berber, Cushitic, Semitic, Chadic, and ancient Egyptian
- afrocentric — centered on, emphasizing, or showing the influence of African or, sometimes, African-American history and culture