1. ostentatious intended to attract notice and impress others
  2. anticipate regard something as probable or likely
  3. Seidlitz powder an effervescing salt containing sodium bicarbonate and Rochelle salt and tartaric acid; used as a cathartic
  4. acetone body a ketone that is an intermediate product of the breakdown of fats in the body; any of three compounds (acetoacetic acid, acetone, and/or beta-hydroxybutyric acid) found in excess in blood and urine of persons with metabolic disorders
  5. ardent spirits strong distilled liquor or brandy
  6. acid test a rigorous or crucial appraisal
  7. contentious showing an inclination to disagree
  8. ascidian tadpole free-swimming larva of ascidians
  9. ostensible appearing as such but not necessarily so
  10. antecedent a preceding occurrence or cause or event
  11. accident surgery the branch of medicine that deals with the surgical repair of injuries and wounds arising from accidents
  12. Odontaspididae sand sharks
  13. acid anhydrides organic compounds that react with water to form an acid
  14. accident-prone having more than the average number of accidents
  15. antiseptic thoroughly clean and free of disease-causing organisms
  16. anticipated expected hopefully
  17. patent system a legal system for protecting the rights of inventors
  18. irridentism the doctrine that irredenta should be controlled by the country to which they are ethnically or historically related
  19. austenitic steel steel that has enough nickel and chromium or manganese to retain austenite at atmospheric temperatures
  20. ostensibly from appearances alone