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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
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