1. A shape that curves or bends inward
   - concave shape, concavity, incurvation

Derived forms: incurvatures

Type of: solid

• spirea
• spired
• spirilla
• Spirillaceae
• spirillum
• spirillum fever
• Spirillum minus
• spirit
• spirit away
• spirit gum
• spirit lamp
• spirit level
• spirit of turpentine
• spirit off
• spirit rapper
• spirit rapping
• spirit stove
• spirit up
• spirit world
• spirited
• spiritedly
• spiritedness
• spiritise
• spiritism
• spiritist