1. 
   Glabellum
   Gla·bel'lum noun ; plural Glabella . [ New Latin See Glabella .] (Zoology) The median, convex lobe of the head of a trilobite. See Trilobite .
   Found op http://www.encyclo.co.uk/webster/G/29
   
   
2. 
   glabellum
   Origin: NL. See Glabella. ... <zoology> The median, convex lobe of the head of a trilobite. See Trilobite. ... Source: Websters Dictionary ... (01 Mar 1998) ...
   Found op http://www.mondofacto.com/facts/dictionary?glabellum
   
   
3. 
   Glabellum
   • (n.) The median, convex lobe of the head of a trilobite. See Trilobite.
   Found op http://thinkexist.com/dictionary/meaning/glabellum/
   
   

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