trabecula

A small supporting beam or bar.

Any of the supporting strands of connective tissue projecting into an organ and constituting part of the framework of that organ.

Any of the fine spicules forming a network in cancellous bone.

In botany, one of the projections from the cell-wall which extend like a cross-beam or cross-bar nearly or quite across the cell-cavity of the ducts of certain plants, or the plate of cells across the cavity of the sporangium of a moss.

plural In anatomy, the fibrous cords, layers, or processes of connective tissue which ramify in the substance of various soft organs, as the spleen, kidney, or testicle, conferring upon them greater strength, stability, or consistency.

In embryology, one of a pair of longitudinal cartilaginous bars, at the base of the skull, in advance of the end of the notochord and of the parachordal cartilage, inclosing the pituitary space which afterward becomes the sella turcica; in the human embryo, one of the lateral trabecules of Rathke.

One of the calcareous plates or pieces which connect the dorsal and ventral walls of the corona in echinoderms.

One of the fleshy columns, or columnæ carneæ, in the ventricle of the heart, to which the chordæ tendineæ are attached: more fully called trabecula carnea.

In entomology, one of the pair of movable appendages on the head, just in front of the antennæ, of some mallophagous insects, or bird-lice, as those of the genus Docophorus. They have been supposed to represent the rudiments of a second pair of antennæ. Also trabeculus.