View your list of saved words. (You can log in using Facebook.)
Definition of TRACHYTE
: a usually light-colored volcanic rock consisting chiefly of potash feldspar
Origin of TRACHYTE
French, from Greek trachys rough
First Known Use: 1821
Light-coloured, very fine-grained igneous rock composed chiefly of alkali feldspar with only minor mafic minerals (biotite, hornblende, or pyroxene). Trachyte is commonly found in volcanic regions; like many volcanic rocks, it shows a streaked or banded structure due to flowing of the congealing lava.