'Glabellum' definitions:
Definition of '
Glabellum
'
From:
GCIDE
Glabellum \Gla*bel"lum\, n.; pl.
Glabella
. [NL. See
Glabella
.] (Zool.) The median, convex lobe of the head of a trilobite. See
Trilobite
. [1913 Webster]
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