<p><strong>Adjective</strong></p><ul><li>Of or relating to rain, especially much rain; rainy.</li><li>Geology: Occurring through the action of rain.</li></ul><p><strong>Noun</strong></p><ul><li>Geology: A rainy period formerly regarded as coeval with a glacial age, but now recognized as episodic and, in the tropics, as characteristic of interglacial ages.</li></ul>