The Collaborative International Dictionary of English v.0.48:
Frangible \Fran"gi*ble\, a. [Cf. F. frangible.] Capable of being broken; brittle; fragile; easily broken. [1913 Webster]WordNet (r) 3.0 (2006):
frangible adj 1: capable of being broken; "the museum stored all frangible articles in locked showcases"