<p><strong>Noun</strong></p><ul><li>Petrology</li><li>a volcanic rock in which rounded cavities formed by the expansion of gas or steam have later become filled with deposits of various minerals</li></ul><p><strong>Adjective</strong></p><ul><li>(of rocks) containing amygdules</li><li>almond-shaped</li><li>Anatomy: of or relating to an amygdala</li></ul>