dacitic
/dæˈsɪtɪk/ or /dæˈsɪtɪk/ (UK), /dəˈsɪtɪk/ (US)
Definitions
1. adjective
Relating to Dacite, a type of igneous rock, or resembling it in texture or composition
“The dacitic lava flows created a vast, dark plain across the volcanic landscape.”
2. noun
A type of igneous rock that is similar to andesite, but with a higher silica content
“The geologist carefully examined the dacitic outcrop to determine its composition.”