n. (Min.) An eruptive rock allied to trachyte, consisting essentially of a triclinic feldspar, with pyroxene, hornblende, or hypersthene. [ 1913 Webster ]
English-Thai: HOPE Dictionary [with local updates]Hope Dictionary
n. (Min.) An eruptive rock allied to trachyte, consisting essentially of a triclinic feldspar, with pyroxene, hornblende, or hypersthene. [ 1913 Webster ]