ozonometer (o-zon-om'et-er)

An apparatus for ascertaining the presence of ozone and measuring its quantity. It consists usually of papers treated with a solution of pota ium iodid and starch. On exposure to an atmosphere containing ozone, the pota ium iodid is decomposed, and the liberated iodin colors the starch ure.] blue. [Ozone, + Gr., metron, a me as- They are present in nearly all adults and are of no pathological significance, p. corpuscle. A small granulation seen on the surface of the dura mater along the longitudinal sinus, p. fo ae. The depre ions upon the inner surface of the skull in which the pac chi on i an bodies are lodged. [Antonio Pacchioni, Italian anatomist, 1665-1 726.]