The Collaborative International Dictionary
Limbate
Limbate \Lim"bate\ (l[i^]m"b[asl]t), a. [L. limbatus, fr. limbus border, edge. See Limbus.] (Bot. & Zo["o]l.) Bordered, as when one color is surrounded by an edging of another.
Douglas Harper's Etymology Dictionary
limbate
"edged, bordered," 1826, from Late Latin limbatus, from Latin limbus (see limb (n.2)).
Wiktionary
limbate
a. (context biology paleontology English) Having a distinct edge, especially one of a different colour; bordered.