What does trabecula mean?
A trabecula is a small, beam-like anatomical structure that provides support within a larger framework. Its best-known use is in the description of spongy, or cancellous, bone, whose internal network is composed of numerous trabeculae. These delicate struts of bone and connective tissue help distribute mechanical forces while allowing the bone to remain relatively light. Trabeculae also occur in the heart, where muscular columns called trabeculae carneae project into the chambers, and in the eye's trabecular meshwork, a fibrous network involved in fluid drainage. The word is chiefly used in medical and anatomical contexts and is often encountered in its plural form, trabeculae. The singular is especially appropriate when describing one individual supporting element or when discussing the structure as a type of anatomical formation.
nounA trabecula is a small, beam-like supporting structure. In anatomy, it refers especially to a slender strut of bone or fibrous tissue that forms part of a supporting framework.
- a slender supporting strut of bone or connective tissue, especially one forming the framework of spongy bone
- a muscular or fibrous column projecting from the inner surface of the heart or one of the heart's chambers
- a component of the trabecular meshwork, the fibrous network in the drainage structures of the eye
"The trabeculae of spongy bone form a lightweight internal network that resists mechanical stress."
"Histological examination revealed that the trabeculae of the cancellous bone had become unusually thin."
"The image shows coarse trabeculae carneae within the ventricle of the heart."
This is the standard Latinized plural and is the form most often used in medical and anatomical writing.
"The radiograph showed a loss of trabeculae in the upper femur."
Inside spongy bone, millions of tiny trabeculae create a strong, lightweight framework that helps bear loads without the weight of solid bone.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does trabecula come from?
The English word comes from Latin trabecula, a diminutive of trabes, meaning a beam or rafter. Latin trabecula originally referred to a small structural beam and was later adopted in anatomical terminology for slender supporting structures. The related English adjective trabecular describes structures characterized by or consisting of trabeculae.
Related word forms
How trabecula is actually used
This is primarily a formal anatomical term. In specialist writing, its plural trabeculae is much more common than the singular, particularly when referring to the supporting network within spongy bone.
Easily confused with trabecula
A trapezoid is a four-sided geometric figure, whereas a trabecula is a small beam-like anatomical structure.