Rhomboid

Rhomboid is a term used in both geometry and anatomy. In geometry, a rhomboid is a parallelogram in which adjacent sides are of unequal lengths and angles are non-right angled. In anatomy, the rhomboids are two muscles located in the upper back, named Rhomboid Major and Rhomboid Minor.

Geometry

In geometry, a rhomboid is a parallelogram where the adjacent sides are of unequal lengths and the angles are not right angles. It is a simple (non-self-intersecting) quadrilateral whose four sides all have the same length. Another name is equilateral quadrilateral, since equilateral means that all of its sides are equal in length. The polygon opposite angles of a rhomboid are equal in measure.

Anatomy

In anatomy, the rhomboids are two muscles located in the upper back, beneath the trapezius muscle. They are named Rhomboid Major and Rhomboid Minor.

Rhomboid Major

The Rhomboid Major is a skeletal muscle on the back that connects the scapula with the vertebrae of the spinal column. It helps in the retraction of the scapula.

Rhomboid Minor

The Rhomboid Minor is located directly above the Rhomboid Major and performs similar functions. It is a small skeletal muscle which also helps in the retraction of the scapula.

See also

• Rhombus
• Rhomboid fossa
• Rhomboid protease

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