Alveolus is a general anatomical term that can be used as a synonym for several more specific structures:

• Pulmonary alveolus, an air sac in the lungs
• Dental alveolus, also known as "tooth socket", a socket in the jaw that holds the roots of teeth
• Alveolus (band), a punk rock band from Pennsylvania, United States

Alveolar, the adjective form of "alveolus", can be used in several contexts:

• Alveolar ridge, the jaw structure that contains the dental alveoli
• Alveolar consonant, a linguistic vocalization depending upon touching tongue to alveolar ridge
  • there are 16 subtypes of alveolar consonants linked from the target page and not listed separately here

Anatomy

Alveole | Alveole | Alvéole | Альвеола