1. having the shape of an almond
Usage: technical
2. containing or characterized by amygdules (almond-shaped cavities filled with minerals)
Usage: geology

Examples

• The amygdaloidal structure of the rock indicated volcanic origin.
• Scientists identified amygdaloidal basalt in the core samples.
• The amygdaloidal cavities were filled with quartz and calcite.
• Geologists noted the amygdaloidal texture of the lava flow.
• The specimen showed typical amygdaloidal features of ancient volcanic activity.