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Noun: alveolus (alveoli)  al'vee-u-lus
  1. A tiny sac for holding air in the lungs; formed by the terminal dilation of tiny air passageways
    - air sac, air cell
  2. A bony socket in the alveolar ridge that holds a tooth
    - tooth socket

Derived forms: alveoli

Type of: sac, socket

Part of: alveolar process, alveolar ridge, gum ridge, lung

Encyclopedia: Alveolus