dense fibrous tissue [L, densus, thick] , a fibrous connective tissue consisting of compact, strong, inelastic bundles of mostly parallel collagenous fibers that are glistening white. Dense regular fibrous tissue comprises the tendons, the aponeuroses, and the ligaments; dense irregular fibrous tissue comprises the fascial membranes, the dermis of the skin, the periosteum, and the capsules of organs. Compare loose fibrous tissue.