SEMILUNAR Meaning and
Definition
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Semilunar is an adjective that pertains to or is shaped like a half-moon or crescent. It is derived from the Latin words "semi" meaning half and "lunaris" meaning moon. Primarily used in scientific and medical contexts, it is commonly employed to describe anatomical structures, particularly valves and arteries, which exhibit a curved or crescent-like shape.
In terms of anatomy, semilunar refers to the semilunar valves found in the heart, specifically the aortic and pulmonary valves. These valves are composed of three crescent-shaped flaps that open and close to regulate blood flow in a one-way direction. The semilunar valves prevent backflow or regurgitation of blood as it is pumped out from the heart to the rest of the body or the lungs. They act as barriers between the ventricles (lower chambers) and the major arteries, ensuring efficient circulation.
Furthermore, semilunar is also used to describe other structures resembling a crescent shape. For instance, semilunar can refer to the semilunar cartilages in the knee joint, which are located beneath the ends of the thighbone and help stabilize the joint. Additionally, semilunar is used to describe the shape of certain arteries, such as the semilunar arch of the aorta, which curves like a half-moon as it branches off from the heart.
In summary, semilunar is an adjective used to depict structures or objects characterized by a half-moon or crescent shape, often seen in the context of anatomy, specifically valves, arteries, and cartilages.
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Half moon shaped, crescentic.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
Common Misspellings for SEMILUNAR
Etymology of SEMILUNAR
The word "semilunar" is derived from Latin roots. The prefix "semi-" means half or partial, while the word "lunar" comes from the Latin word "luna", which means moon. Therefore, "semilunar" literally means "half-moon" or "partially shaped like a moon". This term is often used in anatomy to describe certain structures or shapes in the body that resemble a half-moon or crescent shape.
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