In this article. A solitary pulmonary nodule (SPN) is a single abnormality in the lung that is smaller than 3 cm in diameter. Generally, a pulmonary nodule must grow to at least 1 cm in diameter before it can be seen on a chest X-ray.
The name Mu is of Chinese origin. The meaning of Mu is wood. Mu is used as both a boys and girls name. It consists of 2 letters and 1 syllable and is pronounced Mu.
Full Definition of MULLION. : a slender vertical member that forms a division between units of a window, door, or screen or is used decoratively. â mullion transitive verb.See mullion defined for English-language learners.See mullion defined for kids. ADVERTISEMENT. an upright piece of wood, stone, metal, etc., that separates two windows.