crystosphene Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition noun. a type of crystal structure found in some minerals. Example Sentence The geologist measured thethickness of the crystosphene. More Example Sentences Geologists study crystosphene in various rocks. Synonyms crystal; mineral; gem Antonyms sun Hear It! Say It! Write It! crystosphene Switch to cursive Start Share with your friends: