lobule

1. A small lobe.
2. A section or subdivision of a lobe.

Subdivision of a lobe of an organ, such as the lungs, and pancreas.

A small segment or lobe, especially one of the smaller divisions making up a lobe.

• ansiform l. — a lobule of the cerebellar hemispheres.
• l's of epididymis — the wedge-shaped parts of the head of the epididymis, each comprising an efferent ductule of the testis.
• hepatic l. — one of the small vascular units and associated parenchyme comprising the substance of the liver.
• l. of lung — one of the smaller subdivisions of the lobes of the lungs.
• paracentral l. — a lobe on the medial surface of the cerebral hemisphere, continuous with the pre- and postcentral gyri, limited below by the cingulate sulcus.
• paramedian l. — a lobule of the cerebellar hemispheres.
• parietal l. — one of two divisions, inferior and superior, of the parietal lobe of the brain.
• portal l. — a polygonal mass of liver tissue containing portions of three adjacent hepatic lobules, and having a portal vein at its center and a central vein peripherally at each corner.
• primary l. of lung — the functional unit of the lung, including a respiratory bronchiole, alveolar ducts and sacs, and alveoli. Called also respiratory lobule (below).
• l. quadrangularis — a lobule of the rostral lobe of the cerebellum.
• respiratory l. — see primary lobule of lung (above).
• l. simplex — a lobule of the cerebellar hemispheres.
• testis l. — a group of seminiferous tubules, connective tissue and smooth muscle, the basic unit of the testis.