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.
Definition of TAU. 1. : the 19th letter of the Greek alphabet â see alphabet table.2. : a short-lived elementary particle of the lepton family that exists in positive and negative charge states and has a mass about 3500 times greater than an electron âcalled also tau particle.3. the 19th letter of the Greek alphabet â see alphabet table. 2. : a short-lived elementary particle of the lepton family that exists in positive and negative charge states and has a mass about 3500 times greater than an electron âcalled also tau particle. 3.