1. armadillo a burrowing mammal whose body is covered with strong plates
  2. emulate strive to equal or match, especially by imitating
  3. medulla the inner part of an organ or structure in plant or animal
  4. ayatollah a high-ranking Shiite religious leader who is regarded as an authority on religious law and its interpretation and who has political power as well
  5. Amytal the sodium salt of amobarbital that is used as a barbiturate
  6. ampulla a flask that has two handles
  7. amateur someone who pursues a study or sport as a pastime
  8. immotile (of spores or microorganisms) not capable of movement
  9. amygdala an almond-shaped neural structure in the anterior part of the temporal lobe of the cerebrum; intimately connected with the hypothalamus and the hippocampus and the cingulate gyrus; as part of the limbic system it plays an important role in motivation and emotional behavior
  10. Amarillo a city in the northern panhandle of Texas
  11. amarelle any of several cultivated sour cherry trees bearing pale red fruit with colorless juice
  12. Comatula former usage synonymous with Antedon
  13. immaterial lacking importance; not mattering one way or the other
  14. immutable not subject or susceptible to change or variation
  15. immaculate completely neat and clean
  16. immediately without delay or hesitation; with no time intervening
  17. module an inherent cognitive or perceptual power of the mind
  18. amulet a trinket thought to be a magical protection against evil
  19. tomatillo Mexican annual naturalized in eastern North America having yellow to purple edible fruit resembling small tomatoes
  20. Ohm's law electric current is directly proportional to voltage and inversely proportional to resistance; I = E/R