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

• chlorite
• chloro-
• chloroacetophenone
• chlorobenzene
• chlorobenzylidenemalononitrile
• Chlorococcales
• Chlorococcum
• chlorofluorocarbon
• chloroform
• chlorofucin
• chlorohydric acid
• Chloromycetin
• Chlorophis
• Chlorophoneus
• Chlorophoneus nigrifrons
• Chlorophthalmidae
• Chlorophyceae
• chlorophyl
• chlorophyll
• chlorophyll a
• chlorophyll b
• chlorophyll c
• chlorophyll d
• chlorophyllose
• chlorophyllous