Trabecula: A partition which divides or partly divides a cavity.
- One of the strands of connective tissue projecting into an organ that constitutes part of the framework of the organ as, for example, the trabeculae of the spleen.
- One of a number of small interconnecting rods of bone making up a mass of spongy bone as, for example, the trabeculae within the skull.
The word "trabecula" is the diminutive of the Latin "trabes", a beam or plank of wood, as might be used in a supporting structure.
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