Lamboid

Lamboid refers to a type of suture found in the skull of many vertebrates. Specifically, it is the suture that separates the parietal bones from the occipital bone. The term "lambdoid" is derived from the Greek letter lambda (λ), as the suture often has a V-shaped or Y-shaped appearance resembling this letter.

In humans, the lambdoid suture is one of the major cranial sutures, forming the posterior part of the skull's top. It typically fuses or closes in adulthood, though the exact timing can vary. The presence of this suture is crucial during infancy and early childhood, allowing for slight movement and overlap of the skull bones to facilitate passage through the birth canal and accommodate the rapid growth of the brain.

Variations in the lambdoid suture can occur. Sometimes, small, irregular bones called wormian bones can be found along its course. In cases of premature fusion of the lambdoid suture, a condition known as lambdoid synostosis, the skull's growth can be restricted, potentially leading to abnormal head shape. The lambdoid suture is a significant anatomical landmark used in fields such as anthropology, paleontology, and medicine for studying skull development and evolution.