lith·ic \ˈlithik, -ēk\adjective Etymology: Greek lithikos, from lith- + -ikos -ic 1.: of or relating to stone < eruptions in which only old lithic debris is expelled — Journal of Geology > especially: made of stone < lithic artifacts > 2.[lith- + -ic]: of or relating to lithium • lith·i·cal·ly\-thə̇k(ə)lē, -ēk-, -li\adverb