[tra.bec.u.la] n, pl -lae also -las [NL, fr. L, little beam, dim. of trabs, trabes beam] (ca. 1866) 1: a small bar, rod, bundle of fibers, or septal membrane in the framework of a body organ or part
2: a fold, ridge, or bar projecting into or ex tending from a plant part; esp: a row of cells bridging an intercellular space -- tra.bec.u.lar adj -- tra.bec.u.late adj