OZONOMETER
\ˌə͡ʊzənˈɒmɪtə], \ˌəʊzənˈɒmɪtə], \ˌəʊ_z_ə_n_ˈɒ_m_ɪ_t_ə]\
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An apparatus for ascertaining the presence of ozone and measuring its quantity. It consists usually of papers treated with a solution of potassium iodid and starch. On exposure to an atmosphere containing ozone, the potassium iodid is decomposed, and the liberated iodin colors the starch blue. [Gr.]
By Smith Ely Jelliffe
Word of the day
dust storm
- a windstorm that lifts up clouds of dust or sand a windstorm that lifts up clouds dust or sand; "it was the kind of duster not experienced in years"