1. The external margin of the aperture of a shell 
2. An organ in insects and crustaceans covering the upper part of the mouth, and serving as an upper lip 
3. A lip or edge, as of a basin

Derived forms: labra

Encyclopedia: Labrum

• donee
• Donegal
• doner kebab
• Donets Basin
• Donetsk
• Donetske
• dong
• donga
• dongle
• Donizetti
• donjon
• donkey
• donkey boiler
• donkey cart
• donkey engine
• donkey jacket
• donkey pump
• donkey's years
• donkeywork
• Donkin
• donna
• Donne
• Donnean
• Donner Pass
• Donnian