re·fran·gi·ble \ ̷ ̷ˈ ̷ ̷ ̷ ̷_bəl\adjective Etymology: from refract (I), after Latin fractus (past participle of frangere to break): Medieval Latin frangibilis frangible, breakable — more at break, frangible : capable of being refracted < a prism divides the differently refrangible rays of sunlight > • re·fran·gi·ble·nessnoun