12-letter words starting with a
- acetoacetate — (organic chemistry) Any salt or ester of acetoacetic acid.
- acetone body — ketone body
- acetonitrile — a colourless organic chemical, CH3CN, used chiefly as a solvent
- acetophenone — a colorless liquid, C 8 H 8 O, having a sweet odor: used chiefly as a scent in the manufacture of perfume.
- acetostearin — a waxlike, nongreasy solid, C 23 H 44 O 5 : used chiefly as a food preservative and as a plasticizer.
- acetyl group — the univalent group, CH 3 CO–, derived from acetic acid.
- achievements — Plural form of achievement.
- achlamydeous — (of flowers such as the willow) having neither petals nor sepals
- achlorhydria — the absence of free hydrochloric acid in the gastric juice
- achlorhydric — relating to a lack of gastric hydrochloric acid
- achluophobia — The fear of darkness.
- achromatopia — Defective ability to see colours.
- achromatopsy — Color blindness; inability to distinguish colors; daltonism, achromatopia.
- acid radical — the remainder of an acid molecule after acidic hydrogen has been removed.
- acid washing — a process in which a denim garment is treated with a bleach solution containing chlorine-soaked stones so that the color becomes faded and the material is softer.
- acid-forming — (of an oxide or element) yielding an acid when dissolved in water or having an oxide that forms an acid in water; acidic
- acid-tongued — bitingly critical or sarcastic; sharp-tongued: a critic famous for his acid-tongued reviews.
- acidophilous — thriving in an acidic environment
- acknowledged — recognized as being true or existing
- acknowledger — to admit to be real or true; recognize the existence, truth, or fact of: to acknowledge one's mistakes.
- acknowledges — to admit to be real or true; recognize the existence, truth, or fact of: to acknowledge one's mistakes.
- aclinic line — magnetic equator
- acne rosacea — rosacea.
- acorn squash — a kind of winter squash, acorn-shaped with ridged, dark-green skin and sweet, yellow flesh
- acoustic ohm — the unit of acoustic impedance, equal to the impedance of a medium in which a sound pressure of one dyne per square centimeter produces a velocity of one centimeter per second.
- acoustically — with reference to acoustics; from the standpoint of acoustics
- acoustimeter — a portable electronic device for measuring noise levels, especially those of traffic.
- acquaintance — An acquaintance is someone who you have met and know slightly, but not well.
- acquiescence — Acquiescence is agreement to do what someone wants, or acceptance of what they do even though you do not agree with it.
- acquirements — Plural form of acquirement.
- acquisitions — An asset or object bought or obtained, typically by a library or museum.
- acquittances — Plural form of acquittance.
- acrocyanosis — cyanosis of the hands and feet due to poor circulation of the blood
- acrophonetic — relating to the use of symbols to represent sounds
- acrostically — In the manner of an acrostic.
- acrylic acid — a colourless corrosive pungent liquid, miscible with water, used in the manufacture of acrylic resins. Formula: CH2:CHCOOH
- act of faith — an act that demonstrates or tests a person's religious beliefs
- act the goat — to fool around
- actabilities — Plural form of actability.
- actinic rays — light rays, esp. the violet and ultraviolet parts of the spectrum, that produce chemical changes, as in photography
- actinometers — Plural form of actinometer.
- actinometric — Of or pertaining to actinometry.
- actinomorphy — The condition of being actinomorphic.
- actinomycete — any bacterium of the group Actinomycetes, usually filamentous in form
- actinomycins — Plural form of actinomycin.
- actinostelic — Of or possessing an actinostele.
- action grant — funds awarded by the federal government on a competitive basis to cities that submit plans for urban development and are able to show that such plans have the cooperation and endorsement of private investors.
- action group — a group of people who come together to fight for a particular cause or to carry out a particular task
- action movie — film focussed on action sequences
- action point — one of a series of notes drawn up after a meeting stating what tasks need to be carried out and who will do each one